I purchased this unit three years ago from Guitar Center, put it in the rack and rarely used it. Over time I realized I was relying more on other equipment(Apogee,Universal Audio, IBIS) and this was not getting the use I imagined.  I did not take action previously because it always looked impressive on the rack. But now it is with some pain  and financial loss that I am now offering it on eBay well below what was put into it. If you are seriously thinking about adding one of these to your arsenal this is the one to buy.I realize there are similar units being offered on this site.  The unit is in mint condition. I do not believe I've used it for more than three hours. I take great care of my equipment.  There is no dust internally.  Because we live in uneasy times and cannot trust everything we read on the internet,  included is a brand new,unopened ST4 Spare Tube Kit that was recently purchased for $95 from BH Photo.  Take off the top, put in these tubes, and you will have the satisfaction of knowing you have an unit that is practically new.Sweetwater sells this unit for $2,475 and I do not believe Avalon allows promotions or discounts on their brand. It will come with the original manual, original power cord and will be shipped in the original box with all packingmaterial. The serial number on the box matches the one on the unit. The photos you see are obviously not stock photos. They are photos of the unit you will receive.