I am new to this forum. I attempted to send you a private message and am not sure if it made it's way to you. Just in case it didn't I am sending you this as well.
I hope I do not offend you by making a lowball offer. If the unit is in mint condition I would be willing to purchase immediately for $850. I would send you a prepaid UPS label so you would not have to pay shipping. I'm not sure how much you purchased your unit for (list price is $1250.00) I have seen it offered online for as little as $1095.00 with free shipping and have recieved an offer from an Ebay seller that i rejected for $1025.00. I have not pulled the trigger on a new purchase as I had originally set a budget of $600 for myself.
I should also mention that I own a company that sells car electronics such as GPS/navigation, audio & video etc. to insurance companies. If you would prefer some sort of combination of money and trade or trade only instead of my offer of $850, please let me know. My company is an authorized dealer for over 400 different brands.