I'm not a guitar player, but I used to work at a guitar repair/consignment shop. If you're going to sell it to someone, ask for about $250. Make sure it has new strings and set the truss rod if it's been sitting a while and warped the neck. Also, if there's no finish on the fret board, finger oils can build up and give it a grungy look. If this has happened, remove the strings, take a very fine sand paper or emory board and gently buff the fret board between the frets. Polish with a soft cloth to give it a 'newer' appearance. I'd really have to look at it and hear the resonant tones to really know what it's worth. A $1000 guitar isn't worth anything if it's been sitting in an attic or storage shed somewhere. The tone changes as the wood warps.