you mean you have some sellers who are selling BTC right ?? okay i am ready to buy some small amounts like 10 to 3000$ depending upon how you want me to pay you means payment method
However, you have
only USDT available... 
And if/ when you buy the BTC, you will sell them
here for +7%.

What an idea...

You're looking for buyers to match with the buyers you have?
Probably, he isn't satisfied with the current number of buyers that he has.
