Reference mastering world class dac, preamp, and HP amp. I am second owner, but always kept in kid, smoke, and pet free acoustically treated environment. Mint condition, just no original packaging. But will be double boxed perfectly. 2.4 firmware came out in November, and brings it to dac3 performance minus the newest Sabre chip. I purchased it along with remote as soon as released. I can install firmware prior to shipping. But there are other settings available on board, that are system dependent. I figure buyer would be better off installing to adjust to personel system and set up. Free US shipping.