Hi,
I just found a source with good 30 Luger brass in stock at decent price:
http://www.wideners.com
They've got Starline 30 Luger @ $14/100. I felt pretty happy to find it at that price, as Fiocchi was out of stock in most places I looked. What I did find (Fiocchi or Starline) was very pricey!
Best Regards,
Jim
PS: I have no affiliation with Widener's. Just passing on my lucky find.