Why don't you just get a set of ANCO'* for about $15 a pair? They will last you a good six to eight months.
I guess I am just getting old, but I have no idea where you would be buying wipers for $30 per side. I hope you are not talking about those ricey color-coordinated plastic pieces of crap with all the air foils?
On a related note: If you run your car through drive-thru car washes, you will get alot of wax build-up on the windshield and, therefore, the wipers. That will play hell on your wiper blades.
Try cleaning your wiperblades with rubbing alcohol about once a month. Also give your windshield a good cleaning too with glass cleaner and newspapers while your at it.