Just drop me an email with what you are looking for and I will be happy to send you all the listings in Discovery Bay.
Unfortunately this listing is no longer on the market according to mls alliance, the listing service for contra costa. I show 2 addresses on Biscay ct 2221 and 2220. 2220 I am showing as sold and 2221 showing canceled. If it is 2221 that you are after it may come back on the market but it's anyone's guess as to how soon that could be.
Get in touch with a good agent that can help you find the house you are looking for or that maybe can give you the former listing agent's information to see why it was cancelled.
Best of luck and happy holidays,