You can export MAP prices using SA’s export custom field feature found on the Inventory/Products tab. After you have changed the MAP price, you can upload the new data. You can also export MAP prices as channel overrides if you want to only override MAP prices on channel level.
Here are the steps to follow:
1- Either select the individual products you would like to export or Select All. Once you have the selection, navigate to “Export>Custom..” as shown below.
2- Find or select the “MAP” field from the Pricing tab and click the “Export” button.
3- Download the file from the “Notifications” from the top right of the screen.
After opening the file, you will see that it contains two fields: productdata_sku and MAP.
4- After making your changes and saving, you can upload file back into the SA.
IMPORTANT NOTE: If you want to delete a specific field data, you must leave the cells as empty. This action will delete the data which you have already in SA, when you upload the file back into SA.