Ok, I wasn't sure where to put this so I put it here. I'm asking what kind of money I'm looking at for a '74 Fender Bassman 100 Head. It has one slightly chipped control knob, and one of the tubes blew and isn't original. The sound out of it is excellent in my opinion; it has a minute(almost inaudible; completely inaudible if not playing) crackling to it maybe every 15 minutes or so. I'm thinking of selling it so I can get a louder head; I'd like a non-biased opinion of how much you think it would be worth since I have no idea. Thanks.