I don't know why people post follow-up ads critiqueing other people's listings. Someone has been doing that on our local CL occasionally "informing" the public that a bike sold for less new.
IT'S UP TO THE MARKET TO DETERMINE VALUE.
Sure that '80s Tempo sold for $250 new, why shouldn't someone try to get $400 for it. Is that any different than the person with the mid-range '90s hardtail mtb that paid $1000 for it new and still thinks it's worth $400? The great things about CL is that it's free and open to the public. It doesn't cost anything to put an ad out there for whatever you want to ask and see how many contacts you get.