Just doing a quick internet search, the asking (advertised) price for a 2014 and 2013 model is a little over $10,000. A 2015 is around $15,000. What year is the model you are considering.
Usually, the manufacturer warranty is only 1 year. If you can find out what dealer the owner purchased from, you (might) be able to go back to the same dealer and purchase an extended service plan (Not necessarily a warranty). However, if the original owner had the camper for more than 1 year already, you most likely will not be able to get the new camper extended service plan deal. Unlike automobile companies, you don't get offers for extended plans from RV sources like you do for your car. But the dealer may be able to help you find a suitable alternative.
On the other hand, extended service plans are not always what they are cracked up to be. For a 5 year extended warranty, you could potentially be looking at $2500 to $3000 or more. Now you're playing a waiting game. Will something go wrong with the camper so you can use it (so you've benefited by purchasing the plan ... but that means something broke on the camper), or the service plan company is gambling that nothing happens, and they just got $3000 of your money.
Another thing, extended warranties - service plans are 99% of the time limited. Lots and lots and lots of disclaimers, things that are NOT covered because of ... (fill in the dots ...) Its a very frustrating when you THINK something should be covered and you find out its really not!
I've owned 4 campers in my life: 1 pop-up and 3 TT's. Pop-up had the extended warranty - service plan. This never paid off, because the problem I ended up encountering were all paid for by my insurance. Thanks-goodness I had insurance though.
1st TT had the extended service plan warranty. Never used it. Waste of Money.
2nd TT, did not bother getting an extended plan. Turns out, even after the first year, the manufacturer covered a serious problem that arouse anyway, and didn't cost me a single penny, except for a tow truck.
3rd TT, got the extended 5 year plan. Considering we've not had the camper for a year yet, we're still in the 1st year bumper-to-bumper coverage. My dealer did persuade me to go with the extended plan this time, because this camper has much more sophisticated electronics and slides in it. The cost of the television that came with the camper would pay for itself if it suddenly died. But did I also mention there is still a deductible on our plan too!
If you want my opinion, forget the extended plan. But, before you buy, do get the camper checked out VERY good by someone who knows what they are doing. Make sure you get a clear title, and make sure you have a vehicle adequate to tow.