Yeah , there all alot of 'one-hit-wonders' who'll post in that manner , talesof !
Kinda-sorta stinks like a bait & switch , since most of us like it when members stick around & interact with others a bit (or so I think) .
I'd say rid the forum , but there are many other opinions , I'd suspect .
I'll also comment that all of the regular posters in the past & present (here) seem quite able to find antique 'sale' listings of all sorts , all by themselves .
Allowing folks to post 'for-sale/sale' items is a bit of tacit approval , perhaps , in the minds of the uninformed "New Members" .
All-in-all , the choice is up to the mod(s)/admins & I'm 100% trusting & cool with whatever y'all decide .
Sorry that ya gotta deal with this pebble-in-yer-shoe !