I just bought a marshall from a guy for dirt cheap ($500) which is labelled tremolo 50. Its a 2x12 combo and looks and sounds very much like a bluesbreaker. Can someone identify this amp for me and maybe give an estimate as to how much it is worth?? Here is some pics the seller provided, sorry about the quality. I don't have the amp yet either so won't be able to check it out at all, just wondering if anyone would know just by the pictures.