Why exactly you want buy flash BTC? So far there is two definitions of flash BTC. Which one you need exactly? The first definition seems using by scammers,
It's 99.99% scam, TokenMe.w wants the seller to go first and then start negotiating, you will most likely get banned after sending USDT.
Seller must be able to proof he/she is real and genuine by sending 1 - 100 usdt, after confirmation, we will open a negotiation