bsr – I would not classify clairemont as a rundown area. 92117 is pretty diverse with mid level and more lower/mid level housing stock. It is also characterized as somewhat older housing stock. There is alot of attached housing stock as well.
I think 92117 will be a good candidate for larger drops due to alot of speculative and/or risky purchases. By the same token there are alot of equity rich folk there as well. None of the 92117 housing stock is near the landfill or miramar.