Sean. I think you're a little confused regarding your economic theory.
SeanDezart said:
A car is always worth what someone will pay for at at that moment
So far so good but more demand, less supply pushes prices higher. More supply, less demand pushes prices down. So if two are sold, supply is lower and prices consequently higher i.e. the 3rd will go for more. If I had a 240z on ebay, I'd expect less for it if there were two more for sale, and more if it were the only one.
An 'agreed value' only has any merit if it has taken into account current market conditions, otherwise it's meaningless, as nothing has an inherent 'real' value. If someone says 'It has an agreed value of £10,000 but I'll take £8000, the question would be 'Why?'. Why? because they know no one would buy it for £10,000, which makes the 'agreed value' meaningless. It's easy to agree a value with someone who doesn't want to buy it.
That's that cleared up.
Thanks for the advice BTW. I know I'm not going to get anything that great for four grand, but I thought I could get something that has potential. The car on ebay looks to have. But, of course, I haven't seen it. I thought I could improve it when money allowed. Plus, I really wanted a black or silver one? Anyone selling a silver one? - I'll take it.