Any thoughts on a late 70's Jamboree?

You get what you pay for (if) you are an astute shopper and extrememely lucky. An old rig with with hidden surprises and need repairs/replacements that take a lot of time and money can result in a long delay before you can use it with comfort and confidence. If you really have the tools, time, work space and multiple automotive, electrical, plumbing and RV body work skills, as well as help available, buying and enjoying an old rig may be cost-effective. As uninformed beginners in 1990 we bought an old but nice looking 1979 rig for $13K and regretted not buying a newer rig to the tune of $8000 in repairs and upgrades the first year. You might do a lot better taking advice on this forum.