people buy/build feedback easily now... ebay screws sellers over most often..
Buy with a credit card, and sit back... no credit card will make you pay for something you never received!
I have 950+ feedback and it was 100% positive until this month when people screwed me over for no reason (sellers have no recourse whatsoever)
http://slickdeals.net/forums/showthread.php?t=2716225
Paypal also pulls funds and screws you, I really love ebay, but hate it just as much if not more.