1 GHz 32-bit (x86) or 64-bit (x64) processor
1 GB of system memory
40 GB hard drive with at least 15 GB of available space
Support for DirectX 9 graphics with:
128 MB of graphics memory (minimum)
Pixel Shader 2.0 in hardware
32 bits per pixel
BUT what your aunt has is not really enough and you should consider another 1GB RAM.
I don't think that there is a case to answer as far as miss selling goes.