I bought my cheapy ones at Fred Meyer. The polarized ones used to be halfway decent but now they're the same as normal sunglasses. Not sure what happened. Must have decided to save themselves some money.

They're near the Watch counter at Fred Meyer. Rite Aid used to carry them. Not sure if they still do or not.

Spose if you wanted to spend some bucks GI Joes or Sportco might have some better ones.