Go for an exchange not on a user, they might just scam you in the end
I think you should use the exchange site in this case because you can easily and safely do usdt to eth through the exchange site.In addition, dealing with a person is more likely to be a victim of fraud.
If you don't want to use an exchange for the fees, you can use an escrow. It could be works good. There are a lot of secure escrow. I usually use cryptolocally for buy wax for fiat, but there are also other pairs like $/eth or usdt/eth. Only 1% will be taked by the platform.
Did you guys read the latest update from OP? he already found what he was looking for and he already swapped his TRCUSDT to the ethereum. You guys should read it carefully.
Someone in here already made a successful tx with him.