It's not quite the same though. With digital things, the very existence of it depends on a third party who might close up shop whenever without warning. If Harley Davidson goes bust someday, all the bikes they made don't just vanish into thin air.

This is independent of whether or not you can resell them. Whether or not you're permitted to resell the items won't matter any more if they all vanish due to a company going out of business or leaving the game behind.