I can't find a refurbished unit only new or used. Used are running under $125, but who know what you're getting.
I've checked all of the fuses and the connections are they are clean and free from corrosion. The unit, in fact the entire car, looks brand new. I put 45K on it in the first 2 years and it's been a garage queen ever since only going on a couple of long trips and the to the occasional stereo show over the past 9 years. The stereo has won 7 best in sound awards going up against cars with were factory sponsored Pioneer, Sony, and JL spec cars. That's one of the main reason I don't sell it, I love the stereo and I'd never get anywhere near what it's worth. Besides it is super fun to drive.