For insurance purposes, $800--$1200 would be okay, what you might sell it for requires a buyer who really wants it! You didn't say if it was archtop, those usually get more $$, but many like the flats too. The archtops with round sound holes are also highly prized, as the f-hole models are less rare. If you learn to play CGDA, then you can also play(Tenor) banjo or mandolin family instruments like octave mando or mandocello. Tiny Grimes tuned DGBE, however, and he was one of the best.