What i do now is check the completed listings and bid really low on a bunch of the same items. For example a sweater I got I had been going for about $40, so i bid $25 a few weeks ago on about 17 auctions. I got lucky and won one :P. Its summer so I dont really need it.

and say I win 4 of them. I go sell them for $40 and profit from the few i sell.

Its a good technique