Read the article in the link. The major flaw I see is that the author is understating the cost. He says $60+ for buying a used ball vs. $200+ for new. Really??
I can't say I've seen a pro-shop go through the work of plugging the thumb and fingers, de-oiling (Rejuvinator, Revivor, etc.), refinishing (spinner or Storm surface machine), and then putting the ball on display for $60, including a new drill. Yea, it has to include the new drill for an apples-to-apples comparison to the $200+ brand new ball.
Used is still cheaper, but not by near as much as suggested. Actually, it could be argued that you're better off buying a new ball that's a few years releases old off e-bay. At least you have a better idea what you're getting.