Originally Posted by Park Ridge Phil
But my question now is that I should have the seller operate every single thing in it to make sure no water leeks from sinks or toilet or a warm fridge and so on. That should not be too much to ask I think. Right now it is still winterized. Any opinions?
In short, "Yes"!
You should require a PDI on used trailers just as you would on new. Just plan to work everything from locks to lights, all switches, appliances, hitch, entertainment stuff and ALL systems (do this on battery and also on shore power), and check the roof, ceiling, walls and floors for soft spots, wet spots, prior damage, etc. You get the picture.
Here's one PDI list
. There are others floating around, as well, that might be better for a 5er.
And, you really want to do this yourself.