cafirefhtr,
Visit the manufacturer's web site (customer service page)
http://www.keystonerv.com/customer-service
Check for any "Recalls & Notifications" that may have affected the year & brand. Original owner should also know
what (if any) service recalls were completed. There was a Dometic brand refrigerator recall (industry-wide) which
included several production year's, but I don't know if it went back as far as 2003-2004. There's also a tab
(drop-down menu) for "Previous Year Specs" which may be helpful.
14" tires are still standard on some brands/styles, although it's typically not a problem unless you camp in areas
where ground clearance might be a factor. You might post a question in the travel trailer (or modifications) section
& our members can offer some thoughts/ideas for gaining clearance, raising the trailer [ie 'flipping the axles'], etc.
Hope this helps, and good luck with your decision.
Terri, the Chevy co-pilot