Actually, the condition wasn't as good as I thought... I was expecting immaculate (not unreasonable, as the auction was worded as such), but the front of the unit is in pretty rough shape. The auction itself also said gently used, but I wouldn't call it that. It's got a number of scratches and dings on the front, and part of the Alpine logo is rubbed off. It wasn't fantastically packaged either, not what I would be expecting for an expensive, fragile item.
I'm going to have to think about his feedback. I don't think I'll do negative, I will probably do neutral, but definitely not positive.