I have a guy that has a vintage Gibson ES335TDC. He wants to sell me the guitar along with a bunch of vintage fishing lures, hand carved boats, and vintage railroad lamps. I don’t have a clue as to what any of the items are worth. I have just started researching everything and I found this forum. Is there a guide , a vintage forum, or anything that I can buy to inform me about the guitar ? Thanks for any help and expertise .