This is a great integrated tube amp in excellent condition. I recently bought a quad set of Svetlana 6550 power tubes. I estimate they have less than 100 hours on them. The pre-amp tubes are Sovteks. I have original box and manual. Here is your chance to enter the world of tubes, at a reasonable price of $675 plus shipping. Payment by money order please. Feel free to check my eBay feedback at http://cgi2.ebay.com/aw-cgi/eBayISAP...an89&items=25. This amp received a consumer rating of 4.89 out of five stars at audioreview.com, and MSRP was $1100. http://www.audioreview.com/Integrate..._2717crx.aspx. Please e-mail me with any questions.