I did some work, years ago, similar to what you are suggesting in your OP.
The truth is that there are very few camera shops around that carry the Pentax brand, the closest one being at least 200Km away.
The ONLY camera store in town carries the "usual" (Canikon, Panasonic, Sony) and either they still don't quite realize that Pentax IS a brand nor, when one can speak with a
knowledgeable salesman, I get the usual "Canon/Nikon" is better. I know who works in that shop, believe me.
Nonetheless, your idea is great and the next time I drop by that store, next door to my guitar gear stuff store, I will go in and harass them !