Jay, how are you going to do this being 4hrs away at school?
Sounds like a PITA.
And the buyer shouldn't be getting pricing from anyone but you, unless the boat is being brokered.
2004, I talked to owner, agreed on $, sent a deposit so he wouldn't sell it out from under me, 3 days later on a plane to Florida, took for test run, liked it enough to take it w/ me.
As i said, if the buyer is local, and is asking for a ride so quickly, and the boat (and you) are not easily accessible, think hard about taking him out... you may want to screen it more.