Here are some tips for starting a business selling greeting cards:

1. Research the market: Find out what types of greeting cards are popular, what competitors are offering, and what price points are typical. You may want to specialize in a particular niche, such as handmade cards, eco-friendly cards, or cards for a specific occasion.

2. Develop a unique selling proposition: Consider what sets your greeting cards apart from others on the market. This could be your design style, materials, message, or target audience.

3. Create a business plan: Outline your goals, target market, marketing and sales strategies, budget, and financial projections. A business plan will help you stay organized and focused as you start and grow your business.

4. Find a source for your cards: You can create your own cards using your own designs and materials, or you can purchase cards from a wholesaler or manufacturer. Consider factors such as quality, cost, and turnaround time.

5. Build an online presence: Set up a website or online store where customers can browse and purchase your cards. You can also use social media and email marketing to reach potential customers.

6. Offer excellent customer service: Respond promptly to customer inquiries and complaints, and be willing to go the extra mile to ensure customer satisfaction. Good customer service can help you stand out and build a loyal customer base.

7. Experiment with different marketing and sales channels: You may find that some channels work better for your business than others. Consider selling your cards at local craft fairs, gift shops, or through online marketplaces like Etsy.

By following these tips, you can create a successful business selling greeting cards. Good luck!