Probably my '78 2203. Not for tryin' either. I tried selling it a bunch of times and never got any takers so I decided fuck it and got it modded by Soldano. Sounds great, it always did. I'd owned it for 10 years before the mod and was just bored. I'm so used to it and it covers so many bases, I think it will always be around.
I financed a 71 superlead from GC a few years back for $1000 on a whim and after realizing that my maxed CC's were no joke (also unemployed at the time), came to my senses and sold it about a month later for $1500. Fuck I wish I had had a job. I still miss that amp. The same GC has a late '69 they want $4000 for. They sound about the same.
In the early/mid 90's I had 2 Silver Jubilees. I wish I had kept one. Not Holy Grail by any means but still very cool. Great low end on those 2555's.