You can get in bulk everything you'll ever need at Costco, including, apparently, Costco-commissioned golf balls.
The volume warehouse retailer sells Kirkland Signature golf balls, and, in the Costco tradition, they've got a catchy name: Kirkland Signature Four-Piece Urethane Cover Golf Ball.
The golf balls, which do appear on the USGA conforming golf ball list, are made by Nassau Golf Co. Ltd. of South Korea. The four-piece ball is intended, we think, to compare with Titleist Pro V1s. It has 360 dimples and is a medium-to-high spin ball around the greens, according to the USGA's conforming ball list.
You could get 24 Kirkland Signature Four-Piece Urethane golf balls for just $30 at your local Costco or online. However, after selling out three times, it appears Costco will not be selling the golf ball any time in the near future...maybe never again.