Unfortunately many of the dealers buy the sang, sell them to the next guy who puts them all in a big barrel off to Hong Kong. So, if you have a nice old one, it's in the barrel somewhere crushed up among the rest of 'em. I don't know the market price for a large dried 50 year old sang, all I know is that I bought a lot from one dealer in Wisconsin for $50 a piece when regular ginseng prices were running at 1000/lb. Then I stopped buying cause he came up with so many. I like green sang cause I can dry them myself, which at least I know it's clean and proper. So there is some premium there. The Koreans seem to like green sang more than dry.
There are two kinds of weird prices out there. One is the \"this stuff is worth millions in Asia\" price being asked by a seller, and the \"this crap ain't worth dirt, I'll give you $250/lb\" by a dealer. I believe it's somewhere in between, at whatever price that makes both the buyer and seller happy.
I will be buying sang this year, at least 100 above market price for older stuff from states like NY. The problem is that people still send regular stuff expecting premium, and so I have to quote low, and pay well for the good stuff upon examination. The other dealers are smarter to offer near market prices, and they invariably will get older sang, which many just...stuff them in the barrel.