my 76 ventura is the red and white one above. They are a good trailer but do have their weak spots. Check for spider cracks or worse, cracks right though the upper parts around the
windows. Also check under the
fridge vent to see if there is water under the floor. More standard problems are the window seals and cranks(easily fixed ). Check the
brakes and wiring, after all it is 35 years old.
That being said, mine was an $800 barn yard find that needed a fair bit of work. At $4500 it would have to be pretty darn good. For that amount I would be looking for a
boler 17.
I got up close and personal with mine in the
fall, gutted the whole interior and did a rebuild. Nice flat walls to work with. Did find some cracked roof supports , probably from snow load on the roof. Added some better support for the cupboards while I was in there.
If you have any questions, feel free to contact me.