I have a clean history of steam rep and no scams on record. I just recently started trying to buy some keys and buds from offers on tf2outpost.com. I found a guy who seemed to have pretty good prices and I liked his steamrep. I added the guy we talked for a bit, when he asked for my steam rep I gave him a link to my profile on this site not even fully undertanding what sourceOP was. After a while of talking (I made it clear to him I would go first in trade) he told me he wasn't willing to do it for the fact that I did not have sourceOP rep. So basically my question is, how can I get rep for a trade when I need to trade to get rep? Is there any type of a middleman option or something I can use?