The prices are ridiculous but he's also a very stupid seller.
Who would pay almost $200 for a used 1.6GB hard drive when you can get a brand new 300GB drive for less than half that? :-?
He has 195,793(!) items currently on eBay and only seems to be selling (unsurprisingly) 150-200 things a month. Assuming he gets the stuff for free or for $1-$2 that will not even cover his listing fees, so what is the point? :-?
Most of the stuff he's selling you'd have to pay someone to take away - it is literally just junk.