Mike (@mvmac) and I have varying levels of supplies, though we'll almost always be able to buy them to replenish our stocks.
The ball markers are two-sided. We like to use the lined side to indicate the direction our ball needs to start (our starting line), and we flip it upside down to reveal the "SandMan" when we moved our mark for a fellow player, as a reminder to put it back.
They look like this and are a nice weighted metal:
If you'd like a ball marker, within the U.S. they're:
1 for $10
2 for $18
3 for $25
Current Supporters can take 20% off the price as thanks for supporting the site.
Forum Leaders can take 10% off as thanks for your contributions.
That includes shipping. Quite honestly, it's probably going to be in an envelope.
We accept money via PayPal at firstname.lastname@example.org.