I ordered the 7700 from crutchfield eailer this week and used the $50 off $250 code and was able to get it for 254.98 with the aux adaptor. I wanted the 770 but they don't carry it (does anyone know why they don't have the premier models?) and it looks like the best place to get it for a good price is ebay. I was wondering if it would be possible to return just the unit and keep the install kit. I know it sounds cheap but has anyone ever done this before? If I can't do this, would it be worth the extra 20 or so bucks to get the premier?