The mobile electronics category at the Best Buy in my area already sells/installs car stereos and alarm/keyless entry systems. Since the majority of new cars now include keyless entry, most people nowadays just need replacements for lost/broken remotes. This new product category (replacement car remotes) would be unique in the big box retail sector, and still be a logical extension of the aftermarket alarm systems that are currently sold. Most people have to take a trip to the car dealerships for a replacement. Why not get one while they're at their local Best Buy?