Please list 3 extreamly niche groups of consumers.
3. Urban beekeepers - consumers who keep bees in the city and are interested in obtaining locally-sourced honey and supporting sustainable agriculture.

2. Competitive jigsaw puzzlers - consumers who compete in jigsaw puzzle competitions and seek high-quality, challenging puzzles for their hobby.

1. Vintage fountain pen enthusiasts - consumers who collect and use vintage fountain pens for writing, calligraphy, and as a hobby. They often seek out rare and unique pens and inks for their collection.