I think a good used AD30 would be cool for a basement space. As far as used prices, the only thing I can suggest is to check the used section at Guitar Center or do a "completed listings" search on ebay.
Steve Thompson
Sun Valley, Idaho
Guitars: Fender 60th Anniversary Std. Strat, Squier CVC Tele Hagstrom Viking Semi-hollow, Joshua beach guitar, Martin SPD-16TR Dreadnought
Amphs: Peavey Classic 30, '61 Fender Concert
Effects and such: Boss: DS-1, CE-5, NS-2 and RC20XL looper, Digitech Bad Monkey, Korg AX1G Multi-effects, Berhinger: TU100 tuner, PB100 Clean Boost, Line 6 Toneport UX2, Electro Harmonix Little Big Muff Pi, DuhVoodooMan's Rabid Rodent Rat Clone, Zonkin Yellow Screamer Mk. II, MXR Carbon Copy Delay
love is the answer, at least for most of the questions in my heart. . .
- j. johnson