I think it will be hard to find something with good quality in that price range, at least as far as fishing specific sunglasses go that you will find comfortable enough to wear all day and do what you need them to do on the water.
It has been my experience that inexpensive sunglasses torture my head and the lenses are of dubious quality.
I found some sunglasses that were really comfortable i use for driving and bought a second pair specifically for fishing. The nice thing about them is that the lenses are changeable. As of right now, i have two sets of lenses just for different fishing conditions. There is at least one more set i want to get. Oakley Flak Jacket sunglasses
I recommend them but unfortunately, they are about double your budget. My fishing partner wears Native sunglasses and likes them quite a bit. They are closer to your price range, but still a bit more. Perhaps you can find them online somewhere at the price you need. Native sunglasses
My final comment would be that ,imo, this is one of those fishing accessories that it pays to buy the best you possibly can get away with.
Good luck Grass.