I would add (not specific to Bolers, but applicable to all) that you should check very carefully for water damage to the inside due to freshwater leaks
from above. I looked at a number of trailers before I bought mine, and there were quite a few with moderate to extensive damage due to this problem. I've also read of a fair number of rebuilds by folks here who either bought one of these projects purposely, or else weren't aware of the problem (or thought it was more minor) when they purchased the trailer.
How to check?
1) Smell of must or mold.
2) If there's floor covering, look under it, particularly at the edges (water can run down behind the wall insulation). Many Bolers (mine included) have a fiberglass top floor, but I don't think all do. Check either one.
3) Look up from below.
Another think I look for is whether there has been extensive use of silicone (typically globbed around the windows
, belly band, etc.). Silicone doesn't do a great job of curing leaks
, but you will have a devil of a time removing it and its contamination. Something to factor into the price, if nothing else.
Check the axle
. Many of them need to be replaced, and it's doable, but again, nice to know ahead of time. There are posts on it here you can search out, but basically, when someone bounces around inside the trailer, the axle
suspension should move. Also, see if you have at least a fist-width between the top of the tires
and the wheelwell.