Well.. then it's different story..
But you're old enough to have a bank account ?
Example:
http://www.ebay.co.uk/itm/3GB-MSI-GTX-780Ti-28nm-PCIe-3-0-x16-7000MHz-GDDR5-GPU-876MHz-Boost-928MHz-/360834301747?pt=UK_Computing_Computer_Components_Graphics_Vi...
But you're old enough to have a bank account ?
Example:
http://www.ebay.co.uk/itm/3GB-MSI-GTX-780Ti-28nm-PCIe-3-0-x16-7000MHz-GDDR5-GPU-876MHz-Boost-928MHz-/360834301747?pt=UK_Computing_Computer_Components_Graphics_Vi...