Honestly, somewhere between the $150 to $200 range will get you something bright, clear on the edges, decent field of view, and above all, a lifetime warranty.
Nikon Prostaff, Nikon Buckmaster, Bushnell elite 3200, Leupold VX-1 or Burris Fullfield II among others.
Your choice, all are pretty decent scopes with a lifetime warranty.
Much below that and I don't have a lot of confidence.
Hey, just my opinion.....from a bitter clinger.....