funny this came up..
a customer we hate to deal with (yet treat him like a king) came in the other day asking us to special order him a deda pista stem. the price we gave him was about $55 more than the cheapest price he could find online and wanted us to match the price. at first i were a little hesitant since i would have to special order it but i gave in and lowered our price to within $20 of what he found it for online. i felt this was reasonable since he would have to pay for shipping on top of his price and i would have it for him the next day but i was wrong. he sat there for the next 5 minutes asking me why i couldn't ( or wouldn't) match the price. he had this look on his face like i just killed his first born son when i kept saying that the new price was VERY fair and i would not come down any more. no amount of reasoning would make him understand and he ended up walking out kinda pissed off.
people like that make me set a timer on how much time i have left in this industry.
sure, i could have matched the price and made a few bucks (literally) on the deal but in a way it wasn't worth it.
shops will give deals if you come across as not being a pain in the ass.