I think the storage fee’s put many over the edge to sell and get out. They get in thinking it’s only a $500 a month payment, but then they need to store it somewhere. Now they just added another $125 - $150 a month to park it somewhere. Now they have two monthly bills to pay. A few people I know have to pay to store and they’ve said the places close to home are full with a waiting list and are raising rates.
Then off site storage just adds to the inconvenience of getting it ready for a trip, or the rush when you get home to empty it so you can get it put away.
It takes a year or two, but they realize they only used it once or twice last year and it’s getting sun baked and losing value, and costing more to keep, so they sell it, sometimes taking a loss, but it’s still cheaper then continuing to pay the payment & storage.
I know if I had to pay to store my Class A and pay for another spot to park the trailer, I’d sell it and get out.