How Far off Was NADA from your final sales price?

[Hopeful1]

NADA was the biggest shock for us and coming to terms that it is not a reliable source for Airstreams even though it is a much more reliable source for vehicles.

For us, it was off by $18,000 and percentage equivalent is 54%. I've read TONS of information on blogs about why NADA is so far off, but I was wondering in dollars amounts how far off was NADA value from your final sale's price?