There are a variety of categories for you to buy or sell
1. Home and Apartment
2. Vehicles
3. Electronics
4. Home appliances
5. Personal Belongings
6.Pets
7. Miscellaneous
The only step to do as a seller is:
Post the product photo and description as an Advertisement by choosing a relevant category.
To buy what you need:
Search among all products or browse a specific category, find what you need then see the products photos and description finally contact the seller and make the deal.