There are several accessories that are available when purchasing a new pottery wheel. However, it's very important that you find out which ones will come with the used pottery wheel that you're looking to purchase. For example, most pottery wheels come from the manufacturer with 2 bats. You'll want to make sure that your used pottery wheel comes with bats. Bats can be made of plaster or wood. Some people prefer one type over the other but that's a personal preference. Some people think wood bats have better absorbency which helps make sure the center of the freshly thrown pottery is properly balanced. Other people like plaster bats because they're heavier and they believe they're less prone to become distorted, warped, or splintered.
For more information see:
Buying Used Pottery Wheels