It was meant as a joke. I no longer purchase $2 bills.
For a few months I purchased them from a dealer on ebay since bing cashback made it so you could buy them under face value, as well as stack rebates program, and receive 2% back from ebay towards a future purchase. Bing cashback ended 7/31.
I thought about setting up a deal where I just bought and sold with a few individuals, but the cost of insurance shipping out the bills to another person is costly. It's the sellers responsibility to get the purchased item to the buying member, and if the item is lost in shipping the seller has to reimburse the other party.