So I met a guy who says he has a 1963 Fender Super Reverb 2x10... all original except the speakers. Can anyone tell me about this amp... I'm not finding much online about it. I see a lot about the 4x10 Supers from the 60's, but not much of anything on a 63' 2x10 version. What's a fair price to offer him assuming its in decent shape? I'm not by any means a Fender guru so thanks in advance!