Nvidia 7500 512mb WTF? pissuda umbata?
If that processor is the E6300 Then it then you should pay around 20,000 for the system.
If not it is not worth that much.
Your vga is the 7500 LE right.It is a rubbish card and is a oem only card(it only came is certain branded hp systems)It is actually a 256 card with a TurboCache of 512.