Not sure what you mean. What is the default value? Are you looking to get rid of sale prices? Are you talking all products in the store, or maybe just one variable product?
Need some more information to help out 🙂
I want to set the prices of all products to default, like they are at amazon website cause I changed them but not all and don’t know which ones, it would be the best to reset them to default and then change them.
Products in WooCommerce do not have a default price, did you do some sort of import with another plugin/extension?