Keep in mind that where the market has "come off the most" it is also likely to rise the least. If this is a business venture for profit, you may not want to pick from the first to fall; last to rise group. In the hot market, everything went up. In a normal market that last to rise group may stay flat for much longer than the last to fall group.
Best bet is to find an area that did not fall as much and find a pressured seller like a short sale or bank owned property.
Unfortunately Callalum County is not part of the NWMLS, so I can't give you a report on that. But Whatcom county the median was up about 5k and the mean down about 15k for August over last August.