Pitfalls of buying an older C???

If you aren't discouraged by old because it's old, I wouldn't rule this one out. Appears to have been stored covered. Not in sun all its life. Winnebago is a good coach (but they can still leak!). Chevy is a good platform. The 5.7L V8 (which is what it probably has, but could be a 7.4) is a little small for most motorhomes but this is only 21-ft. Chevy should drive well on the road, although Fords of that vintage drove well too. Ford's handling problems didn't intensify till 1992. Speaking of 21-ft, is that adequate and do you like the floorplan and sleeping arrangement? IMO the Floorplan Rules.
The price? $5000 is what I sold our 24-ft 1984 Holiday Rambler for in 2008 with 105,000 miles. New paint but 8-year-old tires. Everything worked. Actually I priced at $4995, just not wanting the price to start in "5".