Hi, I read an article a couple of years ago that said the deprecitation rate for the 1st 3 years were as follows. Year 1 was 18%, year 2 was 12%, year 3 was 10%, then drops to 8% for several years. Later on around year 10 the price may actually go up!! but not much. I have tried these figures on various MH's and they seem not too far off in general. But there are so many variables it is a hard thing to pin down. You just have to do the leg work and price as many as you can to see a trend and find a price and rig that works for you. Good luck.
98 Gulf Stream