They're still manufactured, and sold in most all golf and sporting goods stores. I usually play Titleist, however. To be honest, as poorly as I play, which ball I choose is of nearly zero consequence.
I wrote a web page on coins as an investment: http://augustuscoins.com/ed/numis/investment.html I agree with most of the members who have responded to this thread. Nevertheless, I think my page is worth reading because it explains why so many collectors think coins go up in value and therefore might be a good investment.