So is it possible to polish a turd? Err nope!
As Desmond Dekker once sang....... OH OH it's a COPROLITE.........
The official term is 'S-bend thingy' on Carreras.derailleur
I like the term 'tyre kicker'Points lost for it not saying "No timewasters, chancers or dreamers!!! No low ball offers; I know what I have!"
Maybe with a price that high he's trying to "sort the wheat from the chaff", serious bidders need only apply.....