Quoting from [sawykd1]:
Do not buy merchandise that is offered, but not avalaible ! ( Like Brands )
Do not buy fakes and counterfeits !
Do not buy at prices that are too good to be true, than you have 95% of payments for fraud, cheat and scam prevented !
What you need to know about the three rules, you find in the resources.
The rest of 5% is business risc, when pay as you mentioned.
Wilhelm