Just found a used one these today for 75$. Its has 2 6CA7 and 3 12ax7a's in the preamp. 90w at 8 ohms Should i go for it? I have an urge to buy it just so I can bi-amp, even though it will be teamed up with a 200w yba200. It also has some mad vintage mojo and it would be nice to team it up with a vintage cab. What do you guys think? I don't need it, perse, but would like it. And at 75$ I can't really go wrong.