How do you know if someone is PayPal verified? I have been contemplating telling him he can't pick it up till its in my bank account
It should say something to the effect that they are verified when you see their user name. I don't know what exactly makes you verified. Like others have said once the money is in your paypal account it's yours. you can leave it there and buy stuff with it or have them cut you a check.
I wouldn't let you keep my money for 3 days with no bike. How does he know that you are not screwing him? That's why cash always works best. When I sold a vehicle a while back, he gave me a cashiers check. I told him I would keep the title until the check cleared and then send him the title.
Always make a Bill of Sale that you both sign and both have copies of. Its doesn't need to be fancy, just says that you sold so and so a (give a brief descriptions with VIN number) for $X on such and such date. Both of you should sign both copies, so you each have one.