SS does hold its value well on eBay. I don't like that flippers are buying up lots of pieces and reselling them, but that's the way sales and outlets work. Half of the goods (or more!) in the Buy Sell marketplace here on SF are outlet pieces from different brands. Nothing you can do about it, except hope that you can get in on the front end of the outlet sale and maybe find something you like in your size.
I was interested in some jackets and a few suits but not enough to pull the trigger, even at the outlet prices. But I did pick up a few nice blue shirts and a couple of ties.
It's crazy a client of mine was telling me Bespoke Savile Row suits go for less than suit supply suits on EBay!