Two recent listings to help track San Francisco's SOMA & South Beach markets
In May 2006 88 King St #1304, San Francisco sold for $1,260,000. Today it is on the MLS asking $995,000. If it sells there that's over a 20% price drop - or 100% equity loss if the owners put 20% down when they purchased.
In March 2008 555 4th St #814, San Francisco (the Palms) sold for $649,800. Today it is on the market for $550,000. A sale at the asking price would be a 15% drop. Unfortunately they've been asking $550,000 for 71 days, so it's more likely to also see a 20% drop.
To see these two listings on the MLS you can enter their addresses at www.SF-MLS-Search.com/welcome.html