I just got a G&P 203 with a handguard for $200. I've seen them go up to $400 but those usually include shells.
What happens is people run them on propane, are disapointed with the performance, and sell em cheap to recoup their loss. Then I swoop in with my CO2 charger and happiness ensues. So you can usually find a few 203s on teh boards that are noticeably cheaper than the rest.
Not for glory, nor riches, nor honours, but for freedom alone, which no good man gives up except with his life.