I hope this works...
Here is a picture of the decal on the trailer and a picture of the manufacturers label
According to FR, from the serial number it is a 28' trailer.
To my knowledge FR only made this 'Lite' for 1-2 years. Gross weight is only 8000# (a key feature when we bought it).
Very hard to find any information on this trailer and neither NADA OR KBB lists the trailer anyplace that I can find.
See why I'm asking for help??
Once I get it home and cleaned out from this trip, (we all know how ugly they tend to get on the road), I'll get pictures of the inside to post it up for sale officially.
As a side note...my son has the tow behind version of this and it was somewhat of a chore to come up with a value for his too.