I found a vintage 1966 Ampeg B-18N at a local shop for $500. (Great cosmetic condition, everything original, tubes in good condition) First off is this a good deal? I'm not too keen on the current market for vintage amps. I'd really like to own an all tube amp, but I'm also trying to save up for a new bass. (MTD Grendel or Warwick Corvette) Just wondering some of your opinions.