I'm considering buying my buddy's vintage SVT head. Can I run it with, say, a 4 x 10" Goliath cab, or do I have to track down another 4 10's or even an 8 x 10" (not worth it, probably, based on the size of the majority of venues I gig. Also, he claims he got it re-tubed and re-biased within the last couple years (has sat completely idle in our rehearsal spot about that long). That said, I remember the rig sounding like G*d 4 or 5 years ago, and then going downhill a bit. He doesn't remember the last bit, but then again I was the guy running through it. It was modded by the Letters to Cleo guy from whom my bud purchased it. I believe the only mod is an added fan with a separate switch. It's probably about a '73 or '74. What would you think a head like this would be worth?