Hello mike !!!!
Almost same for me (used only as preamp, no hours except on center channel, mint condition, box, paperwork manual never opened). Will be 4 months old on Sept 7th (acually less than 3 months, first unit went kathump out subwoofer output when change sources and was replaced just after 4 week trial).
$400 plus shipping (expect $50 but rest will be returned asap).
Bank check would be nice or money order, personal check would wait till clears. Ready for shipping now.
Respond here or email at capedory2000@yahoo.com
Jonathan Bates (your can see posts on audioasylum.com high efficiency forum under norman Bates or at diysubwoofers.org as jonB.
I hope to hear from you as I am itching to build my own amp. I also have a sumo model 9 class A (60 watts stereo) in near mint condition with rare champagne faceplate for $450. This baby is beautiful and can be upgraded with state of the art input opamps which would improve the already great sound(midrange that is so tangible, wife heard improvement on junky cerwin vega dx9s (5+ year old bigest ones at sears) from upstairs !!!!