Meanwhile the Nigerian running the scam has your money.
Of course not.
Here is how it works:
Step 1) You send him $100 via MoneyGram.
Step 2) He keeps the $100 and you never hear from him again.
Step 3) There is no Step 3.
MoneyGram payments are neither traceable nor reversible so, once you send the money, it is gone.
Money flipping isn't legit no matter WHO it's with. Period.
You send anyone that $150, it's gone
money flipping sounds like illegal money laundering and using money gram, you'll wind up with less money than your started with
If you google "money flipping" all you'll see is article after article with "scam" in te title.