The different types of prices are:
Standard Price: The default price you associate with a product, which is automatically included in your Standard Price Book.
List Price: The custom price associated with a product in a custom price book. For example, let’s say you need one set of prices for domestic orders and another for international orders. List prices can be lower or higher than standard price.
Sales Prices: The prices applied to products that you add to your opportunities or quotes. Sale prices can be different than both list prices and standard prices. For example, if you need to offer a special discount on an opportunity.