We had a 2013 Keystone Outback 295RE for 5 years. Good camper.
About the only thing we did to it was swap out the original air conditioner for a bigger one and added the electric tongue jack. In the 5 years, we got new tires. We had vent covers added when we purchased it. I replaced the original battery after almost 5 years. I'd never had it disconnected. The cables were so corroded to the battery terminals, I ended up breaking off the terminals, which resulted in a bit of rewiring for the battery, as all the small connecting cables were corroded, and one broke one one end, causing the other end to need to come loose, causing the next one to break. I eventually got it all straightened up, and then took a real good examination of the camper and didn't object to just "visit" different dealerships.... well, that led to the purchase of our current Montana High Country fifth wheel. (Thinking full timing and retirement.... which by the way ... is only 10 months away now).
Over all, we never had any issues with the Outback. All the appliances worked great, the refrigerator held temps right at 34 degrees, in any weather or outside temperature and the freezer always stood at 5 below .... always, gas or electric.
I burned up the water heater electric element once, but that was my fault.
I kept the camper plugged into shore power 5 years non-stop, unless actually on the road. We did a LOT of winter camping (dry camping) in it too, and we used it for our bedroom in our driveway and slept in it every night for 5 years, except in the months of January and early February. It traveled from central Indiana to Florida about 10 times, Georgia, Alabama, Kentucky, Tennessee, Kansas, South Dakota and Iowa several times. It towed great with our Chevy 3500 dually diesel long bed crew cab with an Equal-i-zer 4-point weight distribution hitch system.
I say all that, because the only true "repair" we had done on it that truly required an RV service facility was to replace the awning when it simply wore thin and tore, also bent one of the awning arms, so had the entire thing replaced. I do believe, that was the only true repair beyond the scope of my ability and talent, time and energy, space and help to do, other than tires.
It was a very good camper. Probably one of the best we had, especially for the amount of use we got out of it.
Just an FYI, a camper can come out of the factory in pristine condition and built with the highest quality and craftsmanship. But if the owner does not take care of it, and AGRESSIVELY maintain it, the best one ever manufactured will be a pile of junk in 6 months if the new owner will not take care of it and abuse it. Regardless of how old they are, new or used, or what kind of condition they are in when you purchase it, it will require diligent work and pay maticulous attention to detail to keep them nice. If you are not prepared to invest your full time effort into keeping it in good shape, and be willing to invest money into keeping them nice, then you might as well go ahead and purchase a used beat-up one to start out with then.