I sell mint and near-mint golf balls by the dozen. The mint balls are like-new and many have never been played. The near-mints are in excellent condition and may have been played for a few holes. The near-mints are the golf balls that I usually play with.
I get them from a golf instructor who literally has thousands of golf balls - many of which are just used for putting or chipping around the greens. Many of them have never even been played before.
They are for sale on eBay, but I can try and give a slight discount to forum members, so PM me if you're interested in any. I usually add more to eBay every few weeks.
Follow the link below to see these golf balls on eBay. Where is says "Enter seller's user ID", put in: scotrk
http://www.ebay.com/sch/ebayadvsearch?_sofindtype=2