This deal has ended.
GolfBalls.com is conspiring with Google to take over the world! GolfBalls.com has an absurd (and likely subsidized) coupon for $10 off $20, but only for those of you who signup and checkout with the new "Google Checkout" feature (bye-bye Paypal...see news story here). GolfBalls.com, go figure, is already one of the best places to buy golf balls, with prices well below anything you could find locally. For example, these Titleist DT Solo balls, which retail for $28, are $20.95 at Golfballs.com and $10.95 after the coupon. Add around $6 for shipping. This is currently set to end 7/15.