One owner - I have been using this as a power amp running from my receiver pre-outs. Has been in use for 3 years in a condo, so it has never been pushed hard (I needed to maintain the peace with my neighbors). Cosmetically and sonically perfect - no scratches or blemishes. Includes original manual and warranty cards. Sound & Vision rated this amp as the best of five power amps in the same class. Here is a link to the article: Sound & Vision Review of PA-5800 The only reason i have for selling is that I upgraded my reciever from an old ProLogic Yamaha to a new H/K AVR320. Even though the PA5800 has more power than my receiver, I am satisfied with the output of the 320 and would like to clean up my HT equipment rack. Retail on this amp when new was $999 US. Asking $500 including free Fedex 2-day delivery service to anywhere in US or Canada. I have pictures, so email me at [email protected] if you are interested.