In my opinion, I don't observe individuals who own Earthroamers selling them to upgrade to a new model. Instead, it seems to me that those who own Earthroamers have concluded that lifestyle and moved on to different experiences, such as acquiring a condominium at a resort or a cabin. Maybe even buyin a plane or a boat.
In the RV / Overlander market, many individuals become exhausted with the nomadic living style. Investing a significant amount of money in a vehicle used only once or twice a year doesn't seem like a wise decision after a few years of ownership.
It's noteworthy that Earthroamer is strategic in maintaining the value of their vehicles by reselling them, thereby keeping the market demand and price high.