Does anyone know where I can get a value on my 1978 450SLC? I need a trade-in or wholesale value. The lower the better. I went to nada.com and they don't give trade-in values. Edmonds.com does give trade-in value but it only goes back to 1980. I need to have a documented low value by Friday on this week at the very latest. I saw some other websites out there that value cars but they charge and I don't want to have to pay for a subscription if it won't give me what I want.

Any ideas???

Thank you