This Forum has nothing to do with transaction. TDF just provides the platform.
Read this thread *www.thinkdigit.com/forum/bazaar/143977-bazaar-section-rules-updated.html
Generally buyer and seller if interested contacts each other and then pays by NEFT(in case of diff. cities), otherwise if seller has no problem and buyer agrees to bear the cost, ebay listing can be done, otherwise a meetup if in same cities.
In case of diff. cities after receiving the payment seller ships the item to buyer's address.
So TDF just provides the platform for the deal, and upon showing interest, everything becomes personal to seller and buyer, TDF has nothing to do after that.
As TDF provides the platform, TDF imposed some rules to minimize the fradulation as much as possible.