If I was the buyer... I wouldn't and didn't agree to that. It's like hot potato... my goal was that no one had all three of these at a time: title, truck and money.
So what I did was Fedex seller a Bill of Sale and a deposit and asked that be returned signed with copy of Driver's License and the ORIGINAL Title, signed. You can always apply for a duplicate title as the seller if deal falls through here.
After I received that back, I sent the payment.
Buyer let payment clear and released the truck for pick up.
This way... at each step, if someone decided to screw the other... they would have some proof there was a deal in place.
But do whatever you are comfortable with