Here’s a SOLD house at 30% loss.
I recall this one might have been on the block at the last REDC auction, but I can’t pull up anything to confirm that.

6883 Halifax Street, 92119 (Del Cerro/Allied Gardens)
Sale price 8/30/04- $735,000
Sale price 9/07/07- $514,500

This is a newer (2003) home in a very central area. While this is the kind of drop I expect to see in outlying/overbuilt areas, its a surprise to see it here. As negative as I am about the market, these folks got a good deal and these kinds of prices make me consider getting back in the game.

The last sale price is provided via tax records I was able to access from a non-public source.
Zillow shows the 2004 sale and the early 2007 “sale” where the bank took it back for 519,430. Funny thing is the zeestimate in this place is still $771,000-
http://www.zillow.com/Charts.htm?chartDuration=5years&testAds=false&zpid=51080327