You can check eBay or Hemmings and use them for a price guide. My 61 is about the same except it's a 6. I bought it as a "parts car" on eBay for $600. To get it running took gas and a battery charge. Since then I've spent another $600+ just to get it "streetable" including 4 tires. There's 2 on eBay now, both st $3,00+ and both drivers. Hemmings has a feature that will give you an average sales price. NADA also has a classic car and truck price section.
The bottom line is whatever it's worth to you to have it is what it's worth!