Originally posted by Parallax I can't imagine what the store was trying to sell you. B&W are about as good as you can get, and
their most expensive is $103.00.
This one or
this one should do you just fine.
Just remember that the worst quality piece of glass between your subject and the sensor is going be the limiting factor as to how good your image can be. This isn't the place to try and get off too cheap.
Parallax is right, but if you have a good brick and mortar see if they have used 58mm circular polarizers such as the B&W, Marumi, or even some of the better Hoyas. Be sure and check the play/slop in the rotation and whether the glass itself fits the frame tightly as well as the scratches and internal dust. Our local B&M has an entire aisle of used filters in Tupperware containers and I've found from 27mm to 77mm and never paid more than $15 except for a nearly new 67mm B&W for $25. Don't be afraid to negotiate, you'll be surprised what you can do.