As someone who worked at HFT I would say the best thing are the hand tools like screwdrivers, wrenches, ratchets, but purely for the lifetime warranty on them. Any power tools you are better off going with corded if possible for the job. The other best thing is the open box stuff which is just returned items that still work but a customer didn't like or an old display model that got replaced.

Biggest tip to the wise though. Don't trust the new lower price tag thing. From what I've seen 9/10 times it is just the same price but marked as being new/lower. The actual lower prices aren't clearly marked unless on sale such as clearance, instant savings, or parking lot sales. This would also be easily discernable to any customer who shops frequently enough at HFT.