We used to have an '03 Kiwi 17a, the little brother to the 23B. We bought it new and had it for 10 years. Got a good trade price for it as it was in excellent condition. I've heard mostly good from other owners in that same time range.
There was a recall on the microwaves from that era, ask if that work had been done. The microwave company sent a tech out to our house to fix it. Can't recall the brand.
We had one small leak on the joint seam on the front panel below the bed. Only leaked when towing in the rain. Easily fixed it with some white caulking. One small leak on a roof seam in the front where the curved aluminum joins the roof. I caught it early, opened it up and dried it out, resealed with Eternabond.
Look for signs of water damage, water stains in odd places like above the beds in the overhead cabinets, things like that. Even stored inside, the seals around the beds can dry out, so they may need attention or replacement. Check the caulking around the windows and all joints, how does it look? Ask to get on the roof and inspect it for the same. as long as things didn't leak, resealing caulking and Dicor is no big deal.
I wish you well, it's a lot of fun!
