Here are some suggestions for selling 3C products on Amazon:

Research the market and competition: Before you start selling, spend time researching the market and competitors. Understand the demand and trends for the products you want to sell, as well as the pricing and marketing strategies of other sellers competing with you.

Choose the right products: Choose products that have market demand and are not prone to excessive competition. You can buy wholesale products from reputable suppliers to get better prices.

Create an excellent product listing: Write clear, attractive product titles and descriptions, including keywords, so that customers can find your products. Make sure your pictures are clear, attractive, and show all the features and benefits of your products.

Ensure the quality and inventory of products: Make sure the quality and functionality of the products you sell meet standards, and keep sufficient quantities in your inventory to meet customer demand.

Provide excellent customer service: Respond to customer questions and concerns promptly, and ensure that the product information and shipping information you provide are accurate and timely.

Optimize transportation and logistics: Make sure your products can be delivered to customers in a timely manner, and choose transportation methods and logistics services as needed. In order to improve your sales ranking and customer satisfaction, make sure your logistics and transportation choices meet Amazon's standards.

Promote your products: In order to attract more customers, you can use Amazon ads or other marketing tools to promote your products.

In short, to sell 3C products on Amazon, you need to invest a lot of time and energy to ensure that your product quality, service, and promotion are excellent.