suggestions are pretty much generic to all FGRV's to some extent.
Other general tips...
Always verify that all of the appliances work, have the seller start the refrigerator
the day before you get there. LP refrigerators that don't work usually need replacement, about $800+ and no, they can't just be "recharged"
Make sure that the electrical
and plumbing systems all work and that there is a battery
in place if so equipped.
Check the age of the tires
, anything over 5 years old is due for replacement, over 8, replace immediately
Make sure all of the outside tail & running lights
When the seller sez "We never used that, but it works" is code for "It doesn't work".
If the seller has any excuses like "we are out of propane
and can't run that" of "there must be a fuse blown" or my fav. "That's an easy fix, I just don't have time" you can usually come to the conclusion that they are covering up something.
If it's a real good buy, unless it's close to Hudson's Bay, it usually won't last a week.....
BTW: What will you be towing with????