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  1. #1
    Junior Member PhilipCohen's Avatar
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    Shill Bidding on eBay: Case Study #2

    Shill Bidding on eBay: Case Study #2

    Shining some light on the more sophisticated and therefore harder to detect shill bidding activity by some “professional” sellers on eBay auctions

    Not another case study on shill bidding on eBay auctions? Yes, sorry, another one. This time a spreadsheet analysis of multiple auctions from some "professional" sellers from the US and Australia. Needless to say the analysis demonstrates, once again, that, contrary to eBay's claims, shill bidding by many “professional” sellers is rampant on eBay auctions. The full comment and spreadsheet download links at:
    http://www.auctionbytes.com/forum/ph...ic.php?t=24296

  2. #2
    Senior Member filtersweep's Avatar
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    I don't get it. If someone originally felt the painting was worth $205 (and bid as such), how can you blame shill bidding for running up the price? The winner paid what he/she was willing to pay.

    Secondly, how can a shill know where the magic price is where they won't "win" the auction as they nibble? Is this based on the interval of the next bid?

  3. #3
    Junior Member PhilipCohen's Avatar
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    First of all, undisclosed vendor bidding is fraud.

    An unscrupulous seller can ascertain your maximum proxy bid in two ways:
    1. nibble away at the proxy bid until the proxy bid does not increment any further.
    2, place a very high bid, become the highest bidder, see the maximum proxy bid, retract your high bid with excuse "wrong amount" and place new bid equal to or just below the max proxy bid.

    It's as simple as that and believe me all the unscrupulous sellers know it (so does eBay); the more professional shills uses multiple IDs to be less obvious.

    If you want an in-depth understanding you will have to read my detailed posts on auctionbytes.com.

  4. #4
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    I will alert you if I find someone who cares.

  5. #5
    Bianchi Goddess Bianchigirll's Avatar
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    shill bidding? is that why an item I was bidding on the other night suddenly jumped form about $75 to 125$? I have always been curious about this. I know they prosecuted (or atleast tried to) some people in NY state a few years ago for something like this.

    between worries about this and 'sniping' I seldom even bother bidding on ebay anylonger.
    when I sell som ething and I would like $50 dollars for it I start the bidding at $40 if I only get $40 no big deal but why start at $1 and then have to cheat to get the amount higher.
    Bianchis '87 Sport SX, '90 Proto (2), '91 Boarala 'cross, '93 Project 3, '88 Trofeo SOLd, '86 Volpe, '89 Axis SOLD, '79 Mixte SOLD, '99 Mega Pro XL Ti SOLD, '97 Ti Megatube, , '90 something Vento 603,

    Others but still loved,; '80 RIGI, '80 Batavus Professional, '87 Cornelo, '86 Bertoni (sold), '09 Motobecane SS, '98 Hetchins M.O., '09 K2 Mainframe SOLD, '89 Trek 2000, '?? Jane Doe (still on the drawing board), '90ish Haro Escape

  6. #6
    Older than dirt CCrew's Avatar
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    What does this even have to do with General cycling? Seems more like a post from a disgruntled eBay user that lost too many auctions.

  7. #7
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    This is why I only buy things that have a decent "buy it now" price. Sure there's the possibility of getting something cheaper if you bid, but it's much more likely you either won't get it, or will end up paying more than the buy it now price anyhow.

  8. #8
    Spandex free since 1963! HauntedMyst's Avatar
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    Quote Originally Posted by CCrew View Post
    What does this even have to do with General cycling? Seems more like a post from a disgruntled eBay user that lost too many auctions.
    Agreed, it should be moved to the off topic forum.

  9. #9
    Dirt-riding heretic DrPete's Avatar
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    Quote Originally Posted by HauntedMyst View Post
    Agreed, it should be moved to the off topic forum.
    Agreed...
    "Unless he was racing there was no way he could match my speed."

  10. #10
    You Know!? For Kids! jsharr's Avatar
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    Can I bid against the move?
    Are you a registered member? Why not? Click here to register. It's free and only takes 27 seconds! Help out the forums, abide by our community guidelines.
    Quote Originally Posted by colorider View Post
    Phobias are for irrational fears. Fear of junk ripping badgers is perfectly rational. Those things are nasty.

  11. #11
    Banned. ModoVincere's Avatar
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    Isn't there a trash can somewhere so you don't litter up foo?

  12. #12
    jackrussellsonabicycle Airwick's Avatar
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    I, for one, thank you for this excellent, imformative post.

  13. #13
    Banned. ModoVincere's Avatar
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    Quote Originally Posted by Airwick View Post
    I, for one, thank you for this excellent, imformative post.
    here, use this tp...you got something on the tip of your nose.

  14. #14
    jackrussellsonabicycle Airwick's Avatar
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    but it was a most excellent article.

  15. #15
    Banned. ModoVincere's Avatar
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    Quote Originally Posted by Airwick View Post
    but it was a most excellent article.
    That changes the fact that it was dumped here, how?

  16. #16
    jackrussellsonabicycle Airwick's Avatar
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    Quote Originally Posted by ModoVincere View Post
    That changes the fact that it was dumped here, how?

    I prefer to think of it as the thread was relocated to bring maximum pleasure to a greater audience.

  17. #17
    Banned. ModoVincere's Avatar
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    Quote Originally Posted by Airwick View Post
    I prefer to think of it as the thread was relocated to bring maximum pleasure to a greater audience.
    Well, we now know Airwick likes catching.

  18. #18
    Gears? CliftonGK1's Avatar
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    If a system can be corrupted for profit, people will find a way to expoit it. Putting that system online only shortens the timeline.

    I gave up on Ebay long ago. Somehow, I've managed to survive without it.
    "I feel like my world was classier before I found cyclocross."
    - Mandi M.

  19. #19
    Free @coasting RUOkie's Avatar
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    It looks to me as if Mr. Cohen is just looking to direct us to his website. That is just footastic.
    Quote Originally Posted by Herbie53 View Post
    Being full of crap and depositing it here consistently is really nothing to be proud of.

  20. #20
    Senior Member
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    A+++++ will read again!!!!

  21. #21
    Senior Member Snicklefritz's Avatar
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    Quote Originally Posted by Bianchigirll View Post
    shill bidding? is that why an item I was bidding on the other night suddenly jumped form about $75 to 125$? I have always been curious about this. I know they prosecuted (or atleast tried to) some people in NY state a few years ago for something like this.

    between worries about this and 'sniping' I seldom even bother bidding on ebay anylonger.
    when I sell som ething and I would like $50 dollars for it I start the bidding at $40 if I only get $40 no big deal but why start at $1 and then have to cheat to get the amount higher.
    +1

    I don't bother with ebay much anymore for the same reasons. I don't have time to sit in front of the computer in the last minutes of the auction in cases where there's no sniping. It's also frustrating to get sniped and I just don't want to set that up that kind of system for myself so I don't bother.

  22. #22
    Senior Member Homebrew01's Avatar
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    Quote Originally Posted by Bianchigirll View Post
    shill bidding? is that why an item I was bidding on the other night suddenly jumped form about $75 to 125$? I have always been curious about this. I know they prosecuted (or atleast tried to) some people in NY state a few years ago for something like this.

    between worries about this and 'sniping' I seldom even bother bidding on ebay anylonger.
    when I sell som ething and I would like $50 dollars for it I start the bidding at $40 if I only get $40 no big deal but why start at $1 and then have to cheat to get the amount higher.
    I think that can be legit. If the current high bid is $73, and someone comes along (Bidder B) and enters a max bid of $125, they will now be the high bidder at $75 (the next increment), but willing to go to $125. Now someone else comes along (Bidder C) and bids a max of $123. Bidder C instantly & automatically gets out bid by Bidder B's max of $125 and the item is now bid up to $125.
    Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike

  23. #23
    Gear Hub fan
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    When I was bidding on ebay I was offered items several times as the second highest bidder apparently after the high bidder supposedly reneged on the deal. I often wondered if these were cases of shill bidding that did not work quite as intended.
    Gear Hubs Owned: Rohloff disc brake, SRAM iM9 disc brake, SRAM P5 freewheel, Sachs Torpedo 3 speed freewheel, NuVinci CVT, Shimano Alfine SG S-501, Sturmey Archer S5-2 Alloy. Other: 83 Colnago Super Record, Univega Via De Oro

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  24. #24
    Junior Member PhilipCohen's Avatar
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    You can put money on it that they were the result of failed attempts to shill bid you higher ...

  25. #25
    Still can't climb
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    this is why for new stuff ebay hardly ever beats the price on websites of other online retailers.
    coasting, few quotes are worthy of him, and of those, even fewer printable in a family forum......quote 3alarmer

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