Yes – there is a market for it.
Value depends on condition
Do all the controls and the pilot light work?
Does the reverb work?
Does amplifier play loud and clean (no distortion)?
Are these any burns or tears in the naugahyde?
Any cuts, tears in the grille cloth?
Are the casters and the handle in good condition?
Do both speakers work?
Are the speakers original?
Does it have premium speakers (JBL, Altec, EV)?
Do you have a cover for it?
For excellent condition I would say $300 to $350
For very good - $250
For good - $175 to $225