I'd leave the buy it now price, you're the only person selling so until competition hits the market keep your price the same. I'm still contemplating ordering the proof. I found it pretty snake-ish that Chris would tell people it was only going to be available until the 14th then completely go back on his word. Also the last release he increased the mintage against his word as well. Seems like the capitalist in him is taking over.
Also, do you have a number in mind for the total mintage after they sell out? I see your coins are in the 300s, on what date did you make your purchase?