Actually I agree with rsc, selling your existing H3 outright will get you a much better price. They really kill you on trade ins unless you have a real junker and can get them to take it off your hands. Look at possibly using a home equity line of credit to buy the new Hummer H3 Alpha outright so you have cash in hand and can negotiate a better price. Then when you sell your Hummer apply that money to the line of credit.
It's the end of the year and dealerships are looking for that end of the year sales number. They want to be accommodating. If you have cash in hand and it's Dec 30th you can really bargain.

 

Good catch, I just saw that. I've read plenty of threads talking about leaking sunroofs and I bet that whats the issue was. Another thing to look into and check out.