I deal with a Napa Auto Parts store sometimes and for years he had his oil filters behind the counter. I once mentioned to him that he might sell more if people can open the box and look at them which i do also, so i was there today picking up a few parts and noticed they were on the shelf where everyone could see and touch them and he says he actually sells many more now. Of course if he lowered his prices on them he would sell even more but i don't think that will happen anytime soon. How many people here like to pick their own filters??