We are first timers and recently purchased a 2006 Dutchmen 29A with 32k.
Note, once your are interested, take your time and do not feel rushed looking it over. Will save you in long run.
A few items on our checklist were the following-
-Cab Leaks- around windows and get on roof to check caulking/seal/cracks
-Tires as others stated
-Run Generator, A/C, water heater, circulating pump,etc
-Run appliances
-Witness a plug in to power at house or where ever you purchase from for 1/2 hr ,put all lights on and make sure battery does not drain. Did this and it saved me hundreds on deal.
-Roll out awning. Also saved a few bucks by doing this as there was missing bracket.
-Witness that CO2 sensors are installed and operating. If disconnected could be sign of electrical issue
-Check circuit panel to make sure nothing missing
-When driving feel for front end wobbles on steering wheel. Feel for shifting issues in tranny
-Have a mechanic look it over if you can. 2nd pair of eyes always helps and a small fee maybe worth it if you are seriously thinking of purchase.
Good luck.