Fyi, Shipping won’t be cheap.
Why not PayPal gift it to remove his risk postage process is the same as domestic.
His pinkbike profile is well enough established (13yr) that there’s an acceptable level of trust.
I’ve been posting sub $100 parts out with honesty “payment on receipt” recently to well established pinkbikers. Not been bitten yet.
I’m in squamish, but there’s a lot of moving parts to this. Forex, cash, guy sells it to someone else in the mean time, forex back, exchange rate difference so you get less back than you sent, gets lost in the mail, etc etc.
Avoiding a 3rd party is best, there’s the better part of a half a day of work doing this.