Value of car purchase? Please, it's complicated!

Well guys and gals, i'm always big on reading ALL the post so to better enable me to formulate a real opinion along with my own real life experiences, so here goes. I'm no different than all the other parents and i do know that parenting is a costly but rewarding experience. Back when my son graduated from high school the wife and i bought him an 88 Corvette Roadster. Black with tan top and all the Greenwood kit. Nice car. Very responsible kid, and to show you how here goes. He came to me one day and said "Dad i want a 4 dr sporty car". Kinda caught me off guard. I though well he wrecked it and i ask him if he did. Nope, didn't happen. He needed something that was bigger with more room. He wanted a ford focus. I looked for a focus but couldn't find what i was wanting, after all it's my money. I found him a 99 Mazda 626 that he has been well satisfied with. This has been 6 or so yrs ago. He's 26 now and still drives the 626 and i still have it in my name and still pay the insurance on it but that's about to change. I have put an engine and tranny in the mazda at my expense. This next week i will GIVE that car to him complete with signed title and not expect nothing in return and i know i wont get any compensation for being dear old dad but i feel fine with that and this is what i expect. No let down here. I didn't mention the previous autos that he drove. There's been many. None ever wrecked. 170, you signed the car over to him and gave away any and all rights to that car IMO and at this point if he shows you any appriciation for being dear old dad then you're ahead of the game. It belongs to him so when he dont use any good judgement on the price to you then it's a done deal. If ya cant stand the price then you'll have to pass and hopefully keep a relationship between you and your son.
Small Block