Vanguard refers

I had one.
It was ok first 4-5 years. By year 7 it was in need of lots of repair. Not as sturdy as similar great dane/utility of same age. (When I was a company guy the boss had all kinds of reefers). By year 7 it's thermal efficiency was reduced. Maximum 80-90 degree below outside temp. Not good if you are going to do frozen on 100+ days. Maybe they have better insulation now. Not sure. If for produce and meat only, temp control would be fine.

From my experience, when it comes to reefers, I would not buy anything other than gd or utility.

 

Same thing
Might be a bit lighter, shows it's age quicker. Something big fleet would buy and dump it 5-7 years in.

I should say any of these used wagons will get the job done and are less to buy than new. They are ok if the goal is to use it for a few years if you are just firing up/entering the reefer world. Just don't intend on doing lots of frozen in summer with an older unit and it should be fine.

 

Like anything new these days, it is mass produced, with cheaper quality materials meant to not last, so you are either buying another one, or paying for high dollar repairs on the new trailer.