You can delete business prices and quantity discounts:
Note: When you delete your business prices, the quantity discounts associated with them are automatically deleted.
Delete business prices and quantity discounts in Manage Inventory
Go to Inventory > Manage Inventory.
Select the Business Price you want to delete and clear the value in the price field by using backspace or Delete.
If you want to remove:
Only one business price, click Save or Save all in the heading.
More than one business price, click Save all in the heading.
Delete business prices and quantity discounts using feeds
Open a Category-specific feed file, a Business Inventory File, or a Price/Quantity File. These templates contain a Pricing Action column, which can be set on a per SKU basis. To delete a Business Price for an SKU, set the value in the Pricing Action column to “delete business_price”.
Note: If you are using a template downloaded before February 23, 2017, you will need to download an updated template that includes the Pricing Action column.
In the feed file, provide the SKU for which you would like to delete the business price in the SKU column.
In the Pricing Action column, select delete business_price from the dropdown. If you have disabled macros, type delete business_price in the Pricing Action column. Do not type 0.
Save as a tab delimited text file and upload the file. Learn more about uploading feed files.
Delete business prices and quantity discounts using XML files
Use Price.xsd to build the Pricing XML feed.
You can use Price.xsd or create your own. Price.xsd contains a Pricing Action tag available at the SKU level to delete both the business price and the quantity discounts previously set for a SKU. This tag is optional.
Set the value delete business_price in the Pricing Action tag.
Submit data feed.
Here's what your XML feed would look like:
For more information, see Manage Listings with XML.