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.
The first two consumer groups seem to be hard to get money from, I'm really interested in creating some business for the third group(listed as 1.), can you give me some advices?
Here are some tips to help you reach this audience:

1. Develop a comprehensive understanding of vintage fountain pens and their history. This will help you better understand the needs and preferences of your target audience.

2. Build relationships with vintage pen and ink collectors. Connecting with these individuals can help you learn more about the market and develop valuable relationships.

3. Utilize social media and online forums to reach vintage pen enthusiasts. You can use these platforms to advertise your products, build brand awareness, and interact with customers.

4. Attend vintage pen shows and events to network and build connections. You can also use these opportunities to showcase your products and engage with potential customers.

5. Develop an online presence for your business. You can create a website and social media accounts to reach customers all over the world.