Sig P6 for $259. Get 'em while you can. For range use, two mags is plenty. and the trigger pull ain't that bad, if you've ever shot a revolver DA- there ya go.
S&W Sigma 9VE, new in box with either 3 or 4 mags depending on what S&Ws offer is du jour- $249 around here. Of course, also has a heavy trigger.
Ruger "P" series- used for under $300.
HiPoint C9- $150 new, two mags. Ugly, but they work, and lifetime warranty.
Smith 3913, or something like that, LEO trade for under $300.
Springfield XD9- can get 'em used for $350 if you look. (mine was).
Police trade Glock 19 or 17- they are out there for $350'ish, if surface finish is not something you are worried about.
KelTec P11- New, for under $300.
Bersa 9mm- new, around $325