I'm trying to find out what the base price would be on an unrestored 1956 Chevy Stepside. 6 cyl on the column. Straight body, hasn't been run in years and probably needs a fair amount of work to get it running again, but in good basic shape. Rust, but nothing extreme. Where would I go to find out what it should be worth? Don't want to make an offer until I have a general idea. Thanks!