upgrading my ram

[bigpaul608]

iv been looking around on ebay for a decent 512 mb of ram, i think iv found it: http://cgi.ebay.com/SAMSUNG-512MB-D...3QQihZ018QQcategoryZ44938QQrdZ1QQcmdZViewItem
is there any resone why i should not buy this? im upgrading so i can play world of warcraft.

 

[Shady]

what are the specs of your PC ?