Used very little, bought direct from Aguilar earlier in 2004. The best sounding bass amp I've ever heard. I'm only selling so I can switch to the DB680 preamp, since I rarely need an amp or speakers on gigs anymore. Located in Toronto. US$1800 + shipping, or C$2250 if you pick it up in Toronto. www.aguilaramp.com for more info. I know it's not double bass specific, but this is a great amp for DB if you're in to the big tube amp kind of sound. Endorsed by John Pattitucci and others.