Need Suggestions on what to do via Blackmarket.

Ever since I Visited Sythe, I've always been Keen to get involved with the Blackmarket, but never known how to. So i decided to post here to ask for suggestions on How I should get started..

• I have a paypal, unverified, but I will be getting a bank account in my own name pretty soon, So i can Verify that
• I have No money, Not for Pins to train an account to sell, Not anything.
• I could do Runescape Services, Training Etc., Things related to Xbox 360 (Some mods, MW2, Halo 3), I also have a friend who does 10th Lobby's for £10, If i can get a good thread going here, maybe He'd partner with me for like 20% of every person got in, IDK if this is a good idea though, I havent spoke to him about it yet.
• I have nothing really to sell, maybe an old runescape account, but its crap. and has a couple of mill (8 at most).

Suggestions?