Does this happen to you all the time?

My car is still a project and not yet on the street, so no, I don't get that all the time - not ANY of the time! But I imagine it'll be semi-flattering at first to hear that kind of stuff, but from what you're saying I expect it'll wear thin. At least now I'll expect it and be ready for it.

Could a sensible answer be: "Everything's for sale, I suppose, but since I'm not really interested in selling this it would take an offer of a LOT MORE than it's worth to interest me. <grinning> That way I could buy another one!"