1987 Triple E Regency Class C 6.9L diesel. 191000km's on the odo. C6 tranny.
Picked it up for $4500 and spent the winter restoring it at an additional cost of around $3000 (power steering, tires, brakes, belts, flushes, leaf spring, new AC receiver dryer and r134 conversion, suspension bushings, some soft wall repairs and resealed windows). All work done myself. Everything works on it and some early camping trips have gone well.
Wanted a smaller diesel class C for our impending 9600km round trip out west and back to Ontario. So far I am getting around 12mpg doing a mixture of local and highway driving. Once I am on holiday I will drive a bit slower ;-)
Definitely have to be a DIY type for an older motorhome, but the end result can save you some $ and be rewarding. Not to mention that if something is to go wrong I will likely have an inkling of how to fix it.