Wait until you're ready to sell it. Not when the money is ready. Only then will you be truly satisfied and settled with the outcome if you do decide to let it go.
I like your point about not selling it when the money is ready. Took it for its first test drive late last week. Needless to say, that was enough to convince me that I am not ready to sell it now, even though the offer is a great one. I never got into this project to make money. I decided I wanted something that will get people's attention. A dozen people honking the horn on a two mile drive and three different people stopping at the gas station to ask about it convinced me that I want to keep the car, for now.
