Went to the store today to try out a boatload of small 1x12 tube combos, and on a whim tried an early 70's SF Vibro Champ. Impressive little devil. It was a little dingey looking, and the knobs worked fine, they didn't spit or crackle when spun (but were a bit sticky), and it sounded great with volume settings at both 5 for the cleaner stuff and 10 for the grit. Tremolo sounded good at both slow and fast settings. Here come the questions... Is the tremolo footswitchable? If so, are the FS easy to come by? Are these fairly easy to get cleaned up? Are they dateable by serial number? (No, I didn't write it down ) They wanted $300 for it. I'm guessing that whatever it's actually worth may not be altered by it's cosmetic condition - it looks old but not abused, no rips, just a bit dirty. Is this a decent price?