Do you need to sell all 100 USDT in one transaction or could pay you for 40 or 50 first? Using PayPal
How is that going to make a difference, instead you have to pay more fee if you are going to make more transactions than only 1. So, I prefer to the op that he should buy some other crypto as he aforementioned he could also accept BTC. I am not a user of Paypal (regular one) so I suggest if the fee is high in swapping the USDT into BTC then the OP is left with only one option.
He can do p2p buy and sell, I suggest him to move his 100 USDT on Binance or some other exchange allowing us p2p and sell the 100 USDT and receive the 100USD on his Paypal or receive 100$ of BTC in his Paypal. As p2p tx of crypto can be done on PayPal.