by VintAxe » Tue Jun 05, 2012 3:46 pm
Can't help you without at least a production date crowhue. The Gibson J-45 was produced from 1942-1985. After 1985 various reissue J-45 models were produced.
With prices ranging from $5,000 to $750 depending on year and model, I'll need more information to ballpark a value.