Uh, the most basic questions are going to be..
What condition is the car in, how much rust, whats the condition of the body, the paint, whats the interior like, the glass, bumpers, wheels, tires, how much of a restoration have you done, motor is rebuilt but with what? Is it bored, new cam, lifters, weber carb? blah blah blah. How about some pictures?
Without knowing these things, I can give you an honest estimate that the car is worth somewhere between $25 and $25,000.
I know this doesnt help, but being so vague is like going to a contractor and asking him "How much to build me a house?" Details my friend. Details.