No cross-posting adverts you've put on other sites. If you have an
item for sale anywhere other than here, like ebay, bikeradar, ctc,
retrobike, etc. then you cannot post it here. However, if you have
posted it on one of those other sites, other people who have
discovered it are allowed to post it in the eBay/Craigslist finds
thread. You must not do this yourself.