So I need to bring every piece of crap to a show or pay a professional appraiser to determine a chair is worth $25. How much did that professional appraisal cost?
Listen, I was just having a bit of fun with you. But yes, if I found something I thought was valuable and decided to sell for top dollar, I'd so some research and possibly pay a professional appraiser. If I learn it's worth $25, the appraisal fee is my cost for playing the game.
As far as CL sellers listing an item as an informal auction, I could care less. I can't control what everyone else does, so I just ignore those ads.