Does the model really matter?
Do you like this trailer you are looking at? That IS what matters.
Why do you care to know "others" opinions about this trailer, YOUR opinion is the only one that really matters. What one person may like or not like may not be the same for you, it is your money, buy what YOU like, not what "others" like!
It is 10 yrs old, most if not all the "bad" things most likely has been worked out with the exception of water leaks and damage from weather.. Those are consistently the same across ALL RV "products" and more an issue of how the previous owners have done the maintenance to prevent roof and window leaks.
Length? Just take a long ruler and measure it.
Weight specs?
Look for the VIN number tag which should be one on the trailer tongue or driver side front side wall or if none of those places, try inside the upper kitchen cabinets.
Vin number tag should contain the GVWR, tire sizes, ect.
You do not need to know the dry weight as that is pretty much a bogus number, RV brochure dry weights tend to be less than the actual production weight.
GVWR weight is pretty much spot on accurate as in that is the max allowable weight of the trailer, you can figure out what the max tongue weight will be using the GVWR.
Example, say trailer's GVWR is 7,000 lbs, multiply that by .15 (15%) and you get a max tongue weight of 1050 lbs!
Side note, tongue weight should be between 10% to 15% of the trailer weight, I would rather error on the 15% side because it is where you will find the maximum towing stability is.