Central I believe was also a family transaction, In Alameda there are no deals, buyers are able to negotiate prices but the prices in Alameda have always held their values for the most part! We are again seeing some multiple offers on properties!
This is a pre-foreclosed sale. The amount might be the loan amount owed by the owner. Mostly they just stated the amount of the first loan paid on the ads to attract buyers. You need to do some more research to know more about the buying foreclosures. You can request information on my website at http://www.AnnieFreeHomeReports.com
It may be that these are a non-arm's lenght transaction which means that the seller and buyer know each other and are selling the property not based on current values. Often times you see this when one family member sells a property to another family member.