I've checked Midway USA, and it seems like I won't find CZ 75B magazines for under $30 (I'm including shipping).
But I haven't exactly been looking gun-shop to gun-shop. The few I checked didn't even have any in stock.
So what are you paying for CZ 75b magazines at:
A. Your local gun shops?
B. Gun Shows in your area?
C. Used ones you saw in a classifieds ad?
Any sites out there cheaper than MidwayUSA?