I'm on my second Coachmen Clipper, both have been pretty much trouble free. I only upgraded to get a floor plan that suited me better. They aren't any worse than any of the other entry level light weight trailers out there. The reasons I went with Coachmen over the others was what you get for the price. Most Clippers have around 30 gallon tanks for fresh, gray and black water, a lot of the others you are lucky to get half of that. Payload or cargo carrying capacity was another, I have just over 800 lbs, some of the other brands are much less, thats something single axle trailers are lacking on in general though. Speaking of single axle, I don't get what the fuss is about. I have been pulling single axle trailers of all sorts for over 30 years without issue, you have a flat you pull over and fix it. The roof AC was another, many of the small light weight trailers have the in wall window units which don't cool as well in the humid Kansas heat.
My Clipper is pushing a tongue weight of 600 lbs. when I'm loaded for a week out in the boonies. I have two batteries and two propane tanks, most Clippers come with one of each. The fresh water tank was in front of the axle on both of my Clippers.
I do agree that the price seems high for a used one, I paid that for mine new.