The 225 is definitely still in production! I just bought another one and it is proofed "AB" which is 2001. Brand spankin' new, baby! It would be a mistake for SIG to stop producing this marvelous tack-driver.
I paid $519 IN CALIFORNIA. Guns are expensive in California. If you don't live in Cali, NY, NJ or Mass you should be able to do much better than me. But definitely get yourself a new 225. Thank goodness they are still making them.