Im not a huge user or fan of ebay, but sometimes you can grab a good deal <especially on bike components>

I grabbed an XT front derailleur for $12.50 <5.17 s/h> ..Usually its 45 bucks or so. So theres a nice 25 bucks saved. As for good deals on anything like Bicycles, component packs, or anything at an outright bargain, forget about it.

I had a high bid on a FULL XT Component set at $102.50 and when i hit refresh the last like 18 seconds, it was at $130 by another user...royal pain in the ***, and it always happens.