Although this question is dated the Principals are the same a few years later. Affordable housing is in short supply in the Marina Del Rey, Playa Vista area. Hence it is key to find a local Realtor who can help you in your search.
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Playa Vista does have CPU units that are priced 10% or more below market value. They do not come up for sale very often and are mostly one bedroom units. You also have to sell these below market when it comes time. The best way to scout for the CUP units is to begin working with a good buyer agent who knows the area.