About 3 years ago, I went on an ebay binge -- I had a guitar get smashed in shipping, and the insurance paid out and so I decided to use the money for amps. I made a search in the amp section for > $100 and "tube" - mostly returns tubes, but a few amps. I picked up 7 or 8 for less than $200 (most for less than $100). I was lucky enough to live pretty close to a great repair shop, with a great repair guy who was on the verge of retiring - I think I irritated the crap out of him, because I took all but one of them to him for a work-over.
My favorites:
1962 Gibson Skylark - 10 inch speaker. I got two of these - one is much better than the other, for some reason:
Stock speaker in one, and a replacement (Weber) in the other. The Weber speakers are fantastic, imo.
1960something Silvertone 1470 - I have to be careful not to overload this one with too hot of a pickup (by turning down the volume on the guitar), otherwise it sounds farty. I think it has a 6 inch speaker - maybe 8 inch.
1950something Magnatone Varsity - [no pic - mother-of-toilet-seat green] - great sounding clean - breaks up well, too, but I don't like to push it.
1960something Epiphone 101 - [no pic - blue tolex] - 10 inch speaker - *really* nice tremolo
A few of them sounded like total crap, it's worth noting -- notably one that said "AC/DC" (pre-dating the band - I think it was from the '50's and designed to work off either an AC or DC wall socket) - these sound awful and are dangerous, too - beware
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for the most part, I'm using the stock speakers. I had one of them re-coned, because it was falling apart. That cost about as much as a replacement, and I'm not sure it's better than a replacement
on the new side, I've got an Epiphone Valve Jr. head that's too dark for me - a friend used a fuzzface pedal with it and it sounded great, though. I've also got a Blues Jr. that I heavily modified - I really like it.