OK, I'll give you the view from the other side (I'm in the Netherlands). Yes, the usual process is just handing over the title, perhaps mailing something to your DMV to register transfer of ownership. I've bought a couple of cars from the US, and in both cases I got the registration (one a small white bit of paper, for the other car a greenish bit of paper about letter size, both out of California) and a bill of sale, took those to our registration agency and registered the car.

If it disappears, I don't think there's much of a problem. No car, no problem, right? I think your main risk is in the buyer doing something bad with the car while still in-country, but I assume there's some sort of procedure to cover your posterior even in case of local sale.

I think the best advice is to call your DMV and ask them if there's a procedure to be followed to declare a car as exported and get it off your name. There may well not be one, in which case it's probably best to treat it as a local sale (which, in fact, it is; the fact that the buyer takes it abroad is not your concern, as far as you're concerned he bought the car from you, in whatever your location is, after that it's his to do with as he pleases).

Bram