Bulkammo.com has a special: 1000 rounds for $550. Seems a darn good price there.
Special price good through April 21, so you'll want to hurry.
They also have 1680 rounds of .380 ACP for $365. That's probably enough ammo to get you arrested in Massachusetts.
Disclaimer: I still owe Steve and company a review from earlier, but this is something I found just poking around their web site.