As a buyer, you can deactivate an existing cash price by completing the following steps:
Click on the Prices feature of the Transactions module in the Navigation panel
You will now see a list of the existing cash prices that you have created. You will also see a red 'Deactivate' button adjacent to each price. Click on the deactivate button that corresponds to the price you wish to deactivate.
Alternatively, if you have multiple active cash prices, you can hit the 'Deactivate all' button. This will deactivate ALL of your active cash prices.
Note: You cannot edit a price once you have created it. Therefore, to change a particular Price, you must deactivate and recreate another. Follow these steps to create a new cash price.