Not just PC parts sadly. People here seem to think they should get 80%+ of the cost back for their second hand crap all the time. Or they they price like $10 less if it’s a brand new item. I’d rather get some protection from CGA dealing with a retailer than save the $10 buying second hand. Especially if it’s electronics.
Not saying there aren’t good deals sometimes, but reasonable stuff always gets snapped up quick. In your case I would just wait for a decent sale and buy new.