A good link for MSRP on any model / year bike back to 1995.

2007 Harley-Davidson MSRP List Page (http://www.geocities.com/reliopoulos/index.html)

Here's a few sites to get trade in and retail prices on mototcycles as well as cars.

New Car Prices | Used Car Values - Official Kelley Blue Book Site
(http://www.kbb.com/)

New Car Prices, Used Car Values, New Car Reviews and Car Buying at NADA Guides
(http://www.nadaguides.com/home.aspx?l=1&w=28&p=0&f=5000&aid=80698&iid=58778&nozip=1)