I put a $20 one up...BUT I did it a little differently. I can't afford to lose any height going into the garage (16x7 door), so I mounted the screen to the bottom panel of the garage door, right above the bottom support that runs across the door.
When it's not in use, I roll it up, secure it with a few canopy ties, and it just sits on top of that support.
Plus, there's no ugly *** screen rolled up under the header for everybody to see.