I shop on ebay but BINs only - and then only from dealers with a 98% or better rating.
Anything less and you're asking to be screwed.
For $125 I picked up a new touchscreen, bezel and hinge and got a thrown-away Gateway tablet notebook working again, plus various other bits and pieces over the years.
I've only fought through auctions a few times, and then it was on stuff that clearly was being bid against by a single only slightly-interested person...