package switching on filters isn't nearly as common at my store than package switching with wiper blades...
people will bring in their old blades, swap the old and new in a package, and walk out with the new blades
or they will switch the expensive blades into the cheap blade packaging and end up buying bosch marathons for basic model anco prices
people will bring in their old blades, swap the old and new in a package, and walk out with the new blades
or they will switch the expensive blades into the cheap blade packaging and end up buying bosch marathons for basic model anco prices