There are countless products that can be sold online, but some popular and successful options include:

1. Fashion and accessories: Clothing, shoes, jewelry, and handbags are always in high demand, and can be sold through online marketplaces or through your own e-commerce website.

2. Beauty and personal care: Makeup, skincare, and haircare products are popular online purchases, and can be sold through your own e-commerce site.

3. Electronics: From smartphones and laptops to headphones and gaming consoles, electronics are always popular online purchases.

4. Home and kitchen goods: Kitchen appliances, bedding, furniture, and decor items are all popular online purchases that can be sold through your own website.

5. Health and wellness products: Supplements, fitness equipment, and health foods are all in demand and can be sold through e-commerce sites.

6. Toys and games: Children's toys and games are popular online purchases and can be sold through your own website.

7. Pet supplies: People love their pets, and online sales of pet supplies like food, toys, and accessories are on the rise.

8. Sports and outdoor gear: Sports equipment, camping gear, and outdoor apparel are all popular online purchases, and can be sold through e-commerce sites.

9. Art and crafts: Handmade items, art supplies, and crafting materials are popular online purchases and can be sold through your own e-commerce site.

10. Books and media: Books, music, and movies are still popular online purchases, and can be sold through your own e-commerce website.