New (Used) MacBook - No Install Discs - Master Password is Locked

Hi everyone,
I bought a MacBook from someone used and when I got home, realized that the computer was locked by the original Administrator's Password. I tried to reset the password by using the OSX Installation DVD method - but the disc they gave me was bogus - didn't work.
So now I have a computer that I can't access or customize because of the locked original Admin Password.
Can anyone help me?
No CDs, No backup image.
Thanks!

Contact the seller to get the password. If they do not have it and the MacBook came with "bogus" disks, I would be suspicious of where that MacBook came from (stolen?).
If it's legit, you should be able to get replacement disks from Apple for a nominal fee (since it's a fairly recent model). Contact Apple Support.

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New (Used) MacBook - No Install Discs - Master Password is Locked

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