First Travel Trailer - 2001 Four Winds 27'

I have noticed some extra caulking around the windows and in the corners outside. Seller picked up the unit off of his neighbor, who upgraded to a newer model. Says the previous owner was very careful with it and took care of everything. It has sat for the past 9 months. We have had some serious rain over the last month or so at times and I did not notice any wet spots inside. I only looked at it briefly yesterday because I had my toddler in tow and could not get down and dirty with it. I've got a few hours tomorrow to look it all over and make sure all is working properly, so I plan on spending as much time as I have available going through it all prior to hooking it up and bringing it home. I peaked up on the roof and notice it is completely coated in some white rubber-like sealant. No water marks on the ceiling that I could see. Since it has been sitting, the fact that there was no noticeable smell when I first walked in was a good sign to me. My nose has a tendency to pick up on the stinky stuff, its sad, but bad smells seem more noticeable to me than say, my wife.

The price is right, under $3k for what appears to be a very solid unit so far that seller states all is working properly with a clean title. I do wish I could run the VIN somewhere for as much history as possible, but when I try searching the standard sites, it comes back with VIN not recognized. Is there another resource I can use to check or decode a travel trailer VIN?