Hi.
Sry if this suggestion has already been posted ,
I mean a commands which which you can active and bump your topic every 4 hours ,
the only mistake is that the first page will be removed faster than now

it was already posted xx times

autobumping topics every 4 hours would cause huge site load, and less users would be active. and what if some1 needs an item fast and offers in your thread after an autobump? he would have to wait a long time for an answer.