okay! this is not a new method. I've read this middleman method here on BHW but its different. It talks about services on the web. Relating this to my method, i thought of something.
This is my idea.
1. Go to malls. List products that are on sale. Say for example, a brand new mcbook air sale for only $600.
2. After listing such products. Go to egay or any site that you could sell. Sell them on high price. Say the mcbook air for $700. If you Receive the money then go hurry and buy it then deliver it to your buyer. So you get extra $100 huh?
I know this method isn't new. But don't be so rude guys. It is just, I did think about this last night haha.