The PNY Geforce 6200 will run in your E510. It's really not much of a gaming graphics card though. $41 and $7 shipping
For just a few $ more you could get the SAPPHIRE Radeon HD 3450 512MB AGP. $50 and $2 shipping
It's more than twice as powerful a gaming card vs GeForce 6200. Just be aware it is also not much of a gaming card.
Passmark GPU scores:
PNY Geforce 6200 = 55
Radeon HD 3450 = 129