Locally, the CZ-75B Stainless sells for on the other side of six and a half Franklins, which is a $100-$150 upgrade over the cost of a regular CZ-75B. I love my CZs and they are my EDC, but they are no longer the bargains that they used to be.
The Bersa MiniThunder Stainless 9mm (not the UltraCompact polymer) will be the least expensive option, selling at around $350 or so. I have never owned one, but I have not yet met many folk that have that also felt poorly for having made the purchase. It's a solid option, especially for folk with average to smaller-than-average hands.
The Taurus PT92 is the second least expensive that I know of (selling for $450 or so). I have owned several, and they are fine reliable pistols that ought not be confused with the hit-or-miss reputation of the later Taurus-designed semiautos. Other than a heavy trigger, they will likely prove highly satisfying if the large grip frame fits your hand.
I would probably favor a used Ruger P89 or S&W 3rd Gen stainless if I was really stuck to a $300 price point, but that's just me. I recently picked up a very clean P89 MKII stainless for $225 out the door, and there is no doubt in my mind that it has easily got the lifespan of a new Bersa or Taurus left in it, even as a used gun.
