I post a lot of the items that come up on Amazon as Used deals. Sorry you feel you got hosed on those. Just send them back and hopefully they will pop up again for $50 on the next Go.
I have bought a Lot of used SHtuff the past couple years and definitely saved a ton over retail, not just tools or shop supplies. Just do not let one item keep you from buying warehouse deals. Yes I have been screwed on occasion, but it is only a small percentage of the total. I try to post deals that are 50% off or better but when I am looking for something I usually buy at 35% or less of retail...

It is a **** shoot but with the amount of items posted in the warehouse deal thread there really are very few complaints. Most of the complaints are deals that seem too good... most of those are listed as 10 Packs and only one item received. Sometimes I can sniff those out just by reading the last few reviews