I've purchased mags and parts with good results. I saw a couple deals when I first signed ip that I didn't jump on right away, it's been about 4 yrs now and those kits have never come up again. On these sites, there are no "too good to be true" deals, there are only deals you bid on or not, and some may never be available again, and truly, in the bidding process, items frequently get overpriced, and are then no longer "too good to be true".