Configuration

From the Buy Out Feature (Admin Interface -> Settings -> Listing Settings -> Auctions & Products -> Buy Out Feature) menu:

Enable Buy Out

If enabled implements buy out in auctions.

Always Show Buy Out Button

If enabled, with the Buy Out Feature enabled, the option will remain active even with bids above the reserve price.

Sellers

Create an auction, enable Buy Out Feature and set a Buy Out Price:

Buyers

The Buy Out button will be on the right side of the screen.