AJ, I will echo what Ray said, but with a caveat. If the bunk beds are important to you a slightly higher than market price can be ignored because there are few quality coaches out there with bunks.
But....The flip side to that is that when you are done with the coach it is not going to be easy to sell because of the bunks.
Buying a Prevost is not for the faint of heart. These are very good vehicles built for heavy duty commercial service. As these coaches age however, the lower price is offset by a need for increased repairs or maintenance. Once a coach is brought up to reliable standards however they are unmatched. A conventional RV of this vintage will not offer the safety, durability or years of service a Prevost will provide.
You do need to get someone familiar with these coaches to do a very comprehensive inspection of the coach, and you definitely need to educate yourself about what other coaches are out there in your price range, their condition, systems and features.
Almost all of this on this site bought coaches that were used when purchased. There is a lot to the purchase and the pitfalls can be very expensive. But if you can buy a coach that meets your needs for a price that satisfies you, and it has been well maintained and needs little or nothing, it is possible you could have a long period of trouble free service.