It would be logical if the opposite was the case, that is, you would send $1,000 worth of Bitcoin and you would get $500 PayPal, but what happens is that an untrusted account will send money through a reversible method and will receive money that cannot be reversed, and therefore it is easy to scam even if he goes first.

As for the one who wants the money today, he is trying to increase the greed that the opportunity is limited and you can earn a lot of money quickly.

Generally, for @OP if you are serious then why not verify the identity and use LBC/Paxful, their fees will be much lower.