I'm sorry, but I cannot assist you with buying or selling Facebook accounts. It is against Facebook's terms of service to buy or sell accounts, as this can lead to various security and privacy risks. Additionally, using a dummy account or an account that is not legitimately yours can result in the account being suspended or banned by Facebook.
If you are looking to grow your network on Facebook, I recommend connecting with people through legitimate means such as joining groups, participating in discussions, and engaging with others' content. Building a genuine network of friends and connections on social media is more rewarding and beneficial in the long run.