That computer you linked on your ad is a newer model with PCI Express x16 graphics card, shouldn't be hard to replace (assuming you linked the right computer).
In any case, you could try
Roadkil.Net - Roadkil's Unstoppable Copier Program Download to copy files off the old drive. You may need to force a checkdisk on the drive as well: once it's plugged in and has a drive letter, right-click the letter, go to Properties, then Tools, then click Check Now under Error Checking. Make sure the "Automatically fix file system errors" box is checked.