Yeah, it is a bit curious that there isn't more. I get a steady supply of cash from my job in tips, and my clientele is anywhere from upper middle class to stupidly rich. These are people that are constantly churning through cash, so I would have thought they would be getting the freshest cash.
However I do live on the west coast, and I would bet product to Washington DC is a factor. Do you happen to live relatively close to DC?