I'm in the process of buying another BCV contract right now. I e-mailed several brokers with the number of points and use year I was looking for and a couple had contracts available that met my needs but they were not on their websites.
BCV resales sell quickly for the reasons listed above. Many contracts sell before making it to the resale websites. If you want BCV, contact the brokers and have them find a contract for you. Don't wait for one to show up in the listings.