As mentioned earlier, we buy and like new. Our '08 Dynasty was driven for just shy of 70K miles over 7.5 yrs. When we sold it, we got back 49% of what we actually paid (45% after consignment fee). I don't thing that was too bad.
I bought a new RV mattress to put in the unit as we had bought a new Pillow to Beauty Rest mattress after the 'piece of junk' Sleep Number kept failing. Put that 'good' mattress in a guest room.
Someone got a very well maintained Dynasty with one year old tires and one year old AGM batteries. There were a couple of small items that needed attention (very small). I hope the coach is serving the new owners well.
I will take care of our new coach just as well and I think it will bring a nice price at 'selling' time. There is a cost to everything..... Ocean cruises, new clothes, furniture, etc. that you will get zero back. Some things hold their value like antique furniture and designer clothes but, again, most things don't.
Things in life have costs and we all put a value on them. I'm an Accountant like the other poster so I know exactly the cost of depreciation.
Safe travels,
MM.