Welcome to the forums. The 76 Caravanner is a 25 ft model (bumper to ball). He is a link to some photos of one http://vintageairstream.com/archives...aravanner.html
I really like the caravanners, they are very roomy inside and are often discribed as the party model since they can hold many people inside. The draw back is that the sleeping area is not seperate from the rest of the trailer like it is in my 25 ' Trade Wind. The unit should be in very good condition to be worth $10K. Everything (refrigerator (gas and electric), heater, stove, oven and air conditioner) should work, the floor should be solid (no soft spots) and the axels should be good. Also the body should have no major dents. The tires should be in good condition, the brakes and bearing should have been serviced in the past year and the owner should include a WD hitch with the unit.
Take a look at this document: http://www.vintageairstream.com/rr_t...condition.html
It should give you a good idea of what to look at and some of the costs of repairs. The document is a bit dated and the prices listed are a little low.
Take your time when you look at the trailer. Have the owner show you everything and take notes of anything that does not look right.
Good luck with the trailer and let us know how it goes.