Silver ghost----First, let me add a welcome to the forums.
From all the reading I have done here, my sense of build quality is that it is not very sensitive to the year it was built. The factory seems to lean on the selling dealer to be the final 30 feet of the assy line. Just my sense.
So, when buying a used trailer, whether 5 years old or 15 years old, the importance of inspecting the individual unit cannot be overstated. Clearly you want one where the selling dealer cleaned up all the little stuff and the first owner was diligent in chasing down any issues with leaks, etc. Once that is done, you should have a good quality trailer.
2003 22ft CCD Int'l
2005 GMC Yukon Denali