Where to buy MCZ account? Is there any one who want to sell MCZ account?
If you want to buy a existing account, you should look into
Digital goods or
Marketplace (Altcoins) boards. Actually Mangocoinz (MCZ) is in a closed beta so, you cannot simply make a new account after a successful sale.
I had a spare account, but I missed the deadline to activate it before the beginning of closed beta, so I cannot help you.