Don't be in a huge hurry to buy if you don't have to.
I do know there will be more used vans for sale this summer because not all businesses will survive and they will have to sell their equipment.
Even the government will have to start putting more things up for auction as there will be stringent cut backs in State and Federal as well as City and County services in some of their departments.
There will be incentives to purchase new vehicles to help out the car makers and that too will increase the amount of used vans being offered for sale by the businesses that do survive and thrive such as the delivery companies, grocery stores, etc.