how can i find balance of CC

[mc will]

Don't buy CC with a known balance as that is for retards. Are you a retard, OP? If you're not, then don't buy known balance cards. They're overpriced for no other reason than to rip you off. As JamesBond said above it is better to just call the bank's automated hotline and you'll get plenty of information. Some banks will require the last 4 of SSN. With some you can get around that by simply spoofing the cardholders phone number. Their system will recognize it and will require less information. Do some experimenting and you'll figure it out.