Looking for tips...

I want to start my own gold buying/selling business, but it's going to be hard to compete with the top sellers.

I'm just looking for some tips, such as how much I should sell each million for, how much I should buy each million for, and if ~100m is enough to start a successful business. I'm hoping I can sell all 100m, then buy more for lower, repeat, and slowly build up.

Also, is the best method PA or WU?

 

I'd personally say PlayerAuctions is the better method, considering more people are able to use it and are registered for it. Western Union I believe is a little bit safer, but less people prefer to use it unless it's a very large trade.