been on the site lately?
lots of discussions about this.
Sadly its a case of the few spoiling it for the many, as there were a few that tried to and did rip people off using this facility.
So it got removed from the site as SCN (quite rightly) didnt want to be a party to people getting ripped off. It no doubt was also causing those running the site alot of agro.
see link here for thread discussing this:
http://seatcupra.net/forums/showthread.php?t=208200
(doesnt come up with a search for 'for sale' or 'for sale section' but did for 'sale closed')
The good new however is they have been working on an alternative selling system which might go live soon..
Ps
or did you know this and have managed a sneaky advert by posting this thread?