Wow, that's a real find!
I'd suggest checking the caulking all round, especially the roof. Look for evidence of leaks on the walls and floors (don't forget the storage areas). Keep an eye on the tires, if they were put on the HTT right after they were manufactured they'd be 3 yr old but most likely they're at the 4 or 5 yr mark which is about the replacement point.
Our first TT was a hybrid and we were amazed at the interior space (bunks out) vs the modest towed length.
Welcome to the Jayco family and to JOF!
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks