i bought a m332 ammo trailer last month. everything was easy, easier than ebay and half the hassle. you need to register with the site and then find what you are looking for, wait for the bidding to open, place bids, and hopefully, win.
becarefull placing bets though, and pay special attn to the LOT AMOUNT.<<<this tells you if you are bidding on more than one item. most bidding starts a $50 and goes up in $5 increments until the high bid is over $100 then it goes to $10 and so on.
i'm planning on doing some more buying in the future.
good luck....