A significant factor in the transactions, Dean notes, is that today's low interest rates make it possible for the buyers to enjoy cash flow from day one. "Underwriting has changed from trailing a 12-month look to trailing a 90-day look," he says. "Lenders don't want to wait to see how something performs."

In Leon's opinion, the deals should break the investment impasse that's kept investors on the sideline since the beginning of the economic crisis. "Everyone is looking to these deals to find out where the market is," he tells GlobeSt.com. "There were so many folks on the sidelines, but now you have data points to say there's where deals are getting done. Now it's a little more comfortable, and they can say, 'Maybe I'll get back. It will definitely stimulate investment activity."

According to Dean, there's a lot of private capital available looking for the right moment to jump back into the market. "A lot of these private groups have been refinancing and building their war chests over the past few years," he says. "They haven't been active in the market, but now they have a large cash reserve to be redeployed. The money that didn't want to compete with the institutions at 4.5 to 5 caps now has the upper hand."

Moreover, he adds, they're buying for the long-term with no immediate exit strategy, which is why Class A properties in prime locations are particularly attractive to them. He mentions he and Leon have a similar property Hollywood in escrow and expected to close in the next 45 days. It also attracted a lot of investor interest.

The two brokers, however, caution not to expect a flood of similar transactions in Southern California, primarily because there aren't that many to be had. "Orange County averages one to two class A trades per year," Leon points out. "It's very different from Phoenix and Dallas. Those are more merchant-builder markets, but there are only an average of 2,300 apartments built per year in Orange County. The Irvine Co. is responsible for 65% of those, and they never sell. So it's rare to find class A product like this. It's similar in Los Angeles. In general, Southern California is a barrier-to-entry market to build and barrier-to-entry market to buy."