Go to Gunbroker.com and search for one you'd like to have.
Find a FFL local who is willing to handle the transaction for a fee that is suitable to your liking and then bid on the gun.
Last I looked, they had about 30 of them in 9mm or .40 cal ranging anywhere from about $250 - $450.
In NY I'd be surprised if you find one for under $375. The $400 range is not really an unreasonable price for one.