I'm probably never buying used from GC again. I ordered an SVT-III pro on Dec 28th, I didn't get it until Jan 14th, which was understandable due to holidays. But they sent me the wrong wrong, a newer Vietnamese one Vs the vintage USA one. Anyways, they shipped the other amp out 2 days later after a huge misunderstanding. The costumer service was great, BUT, the amp needed Biasing, which was fine, only $40. But I later found out that it needed new Biasing things to run at 100% volume (at about 75-80% now) so that's another $200 down the road. They lied and said it worked great. It's missing a knob and the graphic EQ and handle was loose. The tone was too good to take it back, so i guess I'm keeping it forever. 
But all in all, I guess I learned my lesson.
But all in all, I guess I learned my lesson.
I totally understand where you're coming from though. What a nightmare! 
