New RV for the boys

So I went to DOL to transfer the registration and title and they couldn't even figure out the what the RV was worth. It didn't really matter because we wrote up a bill of sale for $500 so I was only paying tax on the $500 not fair market value. When you look up Suncrest the first year that they have listed in NADA is 1985 and mine is a 1984. I told them it was made my R&R Custom Coachworks but still couldn't find anything under that name.

I gave my Insurance company the vin# and they told me exactly what I knew and the replacement value is $4900.