Sorry, they are. They are all bad. The bike shop many not be in the market for rocket engines, but they do use wrenches, and pencils, and valve covers. Imagine their phone rings every five minutes, throughout the work day, with people trying to sell these useful things to the bike shop. It's not any better just because the things are useful. If it's me, I'm not going to buy from a cold caller, ever. I already have suppliers. If I need a new supplier, I'm going to find one. You are making the world worse.