Agree Gary, absolutely crazy prices! They are speculative at best although very easy investments as you can use them on your car, they are not easily stolen (no value on any other car and easily traced by police), they do not need to be insured, no maintenance costs (like a rental property), you can easily sell them privately or via auction, and have traditionally only been increasing in value each year.
Still $2M shows that there is money out there for perceived value investments
*disclaimer, I do own a few.