First off, we have a 1959 Goliath Express panel van for $15,999 USD in Los Angeles with no other info given.
Second offering is a 1960 Goliath Express 22-window minibus, one of 3 known to exist according to the Goliath registry. It is incomplete and weathered, but a worthy project, and like the panel van above, likely to be more interesting to Europeans than Americans.
Find it here for $22,500 USD or trade in Ventura, California
As for why Insomniac Garage has posted these high-priced vans, they are extremely scarce everywhere, and a European collector or enthusiast is likely to pay full price for one or both of these vans.