Very nice, congrats! Around here, that would be a great deal! Utility trailers seem to hold their value quite well, and this one is basically brand new! That's a very lucky find. And not having it be a paperwork hassle is great.
I'd be curious to know the length of the ramp, and how the angle works for loading/unloading tractors. Like if the deck wants to get hung up. I'm also trailer shopping, for a 5x8, and was saw a review of a Karavan 5x8 saying the ramp angle was rather steep for driving equipment onto it, without the deck scraping.
I use separate wooden ramps with my current trailer (whose bed is above the wheels, so probably a little taller than the bed on these), and they are a PITA. But at least the angle is shallow, since they're long. I love the idea of the convenience (and safety) of a liftgate, but don't want the deck to get stuck on it.
For the mesh floors, I think I've heard some people mention putting boards, or plywoood, on top of it. For the mesh liftgate, I've also seen some people say they've welded a reinforcement beam under the liftgate, if the tractor wheels didn't line up with the existing supports, and risk over-stressing the mesh. If the tractor was really heavy, you could maybe even slip something (a block of wood, etc) under the middle of the ramp, to help support it from below.
I like the idea of the 5' width, that should be plenty for my 48" deck with a little room to spare. I'll be interested to hear how it works out for you. I see the Carry-On trailers all over the place around here, they seem very popular.
I saw this 5x8 trailer on Facebook yesterday morning about 20 minutes from the house. Guy said he bought it earlier this year, used it 3 or 4 times but needed to sell it.