Theoretically I
'could' create a Wanted advert for what I'm buying, then Finalize it to the Affiliate, but that would fill the Wanted section with a load of pointless threads...It could be done by having a sub section within Wanted called Affiliates, and whenever anyone buys anything from an Affilliate, they have the option of putting it in there, so both trader and buyer can add to their feedback.
..??? 
Cheers,
Jon