I don't have this model but I have looked at a few like this that are for sale by other CT companies selling the same Imported version.
I think their price of $15k is very reasonable. Most companies are selling this version for $20-25k.
Just keep in mind that IMO, you will still need to spend a few $$ and man hours on getting the Toptrailer version up to the same standard as the more expensive models sold by other CT companies.
My imported CT cost me $10k for a hardfloor rear fold. Other companies sell the same CT as mine for between $14-16k. I modified my CT a fair bit to the stage where I am happy with it.
My advice, if you are mechanically minded, ie can change wheel bearings, shocks and can weld buy the $15k version as you will save a lot of $$$. If you are mechanically challenged, buy the more expensive version from one of the more reputable CT companies that have already addressed these problems. Good luck.
PM me if you want more advice on the mods.

Muz.