I take Venmo and haven't seen any taxes or fees requested, but my stuff is all reported.
I can't say to trust the guy, could certainly be a scam, but lots of banks will use only one or another service. One bank I have uses Zelle, Venmo is pretty easy, and of course Paypal works with most anyone.
If you are suspicious, be conservative, that's a good chunk of money, but it could be he is too and wants some protection.