Bringing a U.S car into Canada

Spring Fling LOL Are you going again this year...I think I ran into you just when I was leaving last year.

I've never been to Spring Fling -- are you maybe talking about MoparFest? I doubt if I'll be going this year; I'll probably have already moved out West by then (or else I'll be right in the middle of the move).

I was thinking about driving the car back if I like it...so does that mean I have to stay down for three days?

No, you can have the seller fax the title to your choice of Customs offices ahead of your arrival.

I thought it might be easier if he brings the car into Canada and do the deal on this side of the boarder

No, that makes it much harder, both for you and for the seller. All the official importation paperwork has to be done at the border, and he who brings the car across the border is the importer (and therefore has to pay the duties etc.).