Value of a 1940...

[41panelmark]

I am sure this has been tossed around a bit before but I have not had a need to know it until now. I am considering purchasing a 1940 2 door sedan deluxe that has been fully restored.

How does one find out what the value of something like this would be?

Now I understand that the word "restored" can mean a lot of things so I am guessing that there are some guidelines for this also.

thank you in advance.