Hello Mona, Unfortunately at this time there are no duplex units for sale nor are there units for sale in the Bixby Hill area of Long Beach. The good and bad news here is that there are some units for sale in the immediate area around Bixby Hill, "but" their starting price is $665,000 for a duplex.
The city of Long Beach can provide you a property within your price range but their are key questions for you to be asked in order to guide you into the right areas of Long Beach with fit your personality.
If you are looking for a full time REALTOR who is a professional..I am here for you who is ready and willing to work for you.
Hope this quick snap shot of your target area was of some help for you.