I agree with Mike, throw out the blue book. We purchased our 04 discovery in 2016. Single owner, stored inside, full maintenance receipts, 42K miles. This coach was simply like new. If I remember correct, the book only showed 58K value. We paid more than that and glad we did. prior we had a Winni A gas. All I can say is: we should have bought a DP many years ago.
George and Diane, 2004 Discovery 39S pushed by our Keywest CC w/115 Johnson