Just giving you honest advice...you are in no way, shape or form ready to be a vendor. And I know you are not saying you are ready...but the fact is that just because you have a desire to be one and you believe you have the coins to be one...even just selling coins takes a lot of knowledge and time and means...and you do not seem to have 2 of them. I think it is nice of you to want to help people get btc...but you would be in for a big surprise. I hope you understand what I am saying. And what is gumtree can you explain?