Here is some research material for you to browse.......
http://www.autotrader.com/fyc/search...c=__aHlicmlk__
The link contains some 427 2005 HAH and their prices throughout the country.
I have an 05 HAH also and if I could get what your dealer is offering I would jump on the offer asap. Just be sure they arent jacking up the 'new' vehicle to offset the very attractive trade in offer.
Best of luck
Tony