Considering the proximity to the beach areas and there are some blue water views in the neighborhood I wouldn’t say the 2006 sale price was necessarily out of line. As a listing price, the $755k isn’t a bad point to start from. Interior paint and carpet are relatively inexpensive to complete, so the $5k isn’t far off, either.
For reference, this area is somewhat comparable to the area west of I-5 and east of Coast Highway in Encinitas, and I’m sure you’d find similar pricing there. Over the long term, south OC has always sold at slightly higher prices than northern SD county because of the better proximity to major employment centers.