Have you seen it in person? Have you checked the age of the tires. On mine they were all made in June /2015. We didn't care for the recliner chairs in it so bought theater seating @ $925. Sold the chairs for $125 each. Any idea of how old the batteries are? 6v or 12?
I replaced the original 12v batteries on ours with golf cart 6v from Sam's Club.
I think on a different post you said it has 6 batteries. So if it needs tires figure about $1,000 and if needs batteries that's another $600. Seating $750-$950. Fridge?
If in great shape maybe offer $27,500? Just my little more then $.02