This is an imaginative, but unlikely scenario. The Platform Coop movement is more likely to produce this kind of omni-services portal, where any type of manual and intellectual work is offered by workers. eBay has not shown in recent years the will to move from disposal of cheap goods to a differentiated selling environment.
Imagine telling eBay where you want to go and asking available cars to bid for your business in an instant auction. You could choose a fancy car, a cheap car, a car that’s really close, or a carpool. If you have a car ready to go to work, you can set a price floor and leave her in the parking lot until the dollars get interesting. And you can make sure she’s back where you are when you need a ride if you’re set on riding in your own investment rather than somebody else’s. So transportation becomes a way to invest your money rather than a simple expense.