Please don't buy one of these old Eagles, no matter what the price is unless there is a way to inspect/certify that the structural metal underneath and especially in walls is in good condition or has been properly replaced. There have been too many horror stories about this over the years. Unless, of course you love to tear apart/ dismantle and repair coaches with lots of extra money and time. In this regard, an older GMC would be a better choice, even over an older MCI, as they had similar rust issues also. Of course old GMC's have their own set of issues, but not this major one. Bottom line...just spend the time to thoroughly check one out before jumping on it. Now is a good time to get something, as the economy and especially fuel prices has caused conversions prices to plummet. There are many steals along with the junk.
The Eagle and MCI owners will probably weigh in with their experiences and tips.
Would that not be good advice for any bus make and model, not just for Eagles? No major rust issues in this old bird.