It's very easy to buy stuff at GM2P.com, here is the process:
1. Create an account on GM2P.com.
2. Find the product you want to buy, compare the sellers' price and service, choose a good seller to buy stuff.
3. After you made the order, waiting the seller to deliver the product, and if you have any question, you can contact the seller in your account center. Account Center -> My Order.
4. After you got the product, click complete the order and give the seller a rating.