I have a 2006 Jayco 29FBS. If I had to buy it, I'd focus on:
- Ensure all appliances work properly. Especially the expensive items like fridge (in different power mods), its stove, its microwave, its slide motors, its convertor, etc. etc.
- Ensure the hot water tank runs on both gas and electric.
- Ensure all tanks (fresh, grey, black) are good as well.
- Ensure 12V water pump works.
- Crawl on the roof and do detailed inspection of its roof. Within my region, RV EDPM roofs only last 10-15 years. It all depends where the RV was stored (inside or out) and if previous owner did yearly cleaning / caulking inspections. Very, very critical the previous owner did annual roofs inspections and where needed, applied dicor caulking and/or ether-bond tape over its natural aging cracks.
- Focus on the Tire Date (date they were made) as well. Just like in the automobile industry, RV tires should be replaced every 5 years. And, "must be" replaced every 7 years. If tires older than 7 years from the creation date, get them replaced.
For my 2006 Jayco, I removed every one of its 11 windows and re-sealed them (by removing their factory foam and installing brutal caulk, then add proflexRV adhesive). During this DIY fix on its year 4, I noticed 3 of its windows were leaking and 1 was leaking really bad. They were leaking inside the wall cavity and they had no outer signs of outer leaking. If not done already (by previous owner or RV dealer), I'd remove its many windows and re-seal the proper way. re:
For your Jayco, look for its Hot Water tank location. If HW tank is within storage compartment that can have other stuff in the compartment, see if that "stuff" can slide into the HW tank. On my Jayco, I bought a steel screen (at local home hardware store) and installed it "around" my HW tank. Very easy and low cost DIY upgrade. Now, the HW tank can breath, I can see if its leaking and most importantly, any "stuff" cannot slam or fall against the HW tank - that could create a fire. Very simply DIY fix - using common home hardware store parts.
If RV Dealer is selling the RV, get them to pull/inspect every brake drum. If needed, get them to install new parts. And since wheel hubs are off, get them to re-fresh its wheel bearing grease as well. If private seller, you get trailer delivered to your RV dealer and the seller pays for the cost. If wondering, I bought my first trailer "AS IS" and after doing my own Brake Inspections afterwards, I had to replace all of its 4 x brake assembly and 4 x drums. Expensive Lessons Learned. Don't make the same costly mistake I did.
If RV Dealer selling trailer, get them to include a 30 day end/end repair inclusion. If anything breaks (or found broken) in 30 days, they fix - 100%. If leaks within 6 months, they fix 100% as well. If wondering, my one buddy bought a used RV and got the 6 months water leak inclusion. Guess what happened on month 4? Today, my buddy has a brand new roof on his RV (RV dealer payed 100% of it).
I don't know your exact model and floor plan. But knowing what I know today, get a layout that allows a longer mattress to be installed. I installed a much better house queen (which is 7" longer) in my Jayco. And, threw away its factory RV Queen (short) mattress in the trash. That 7" longer Queen mattress allows a comfortable sleep.
Hope these items help….