Yep, ebay is not a good place to buy product keys from. Another thing to check is that the office version they key is for is the same as the one you have. Instead of Office, try OpenOffice (www.openoffice.org), it's a free suite that is pretty much the same as MS Office. Some interface and format differences but unless you are heavy into using special features you'll never notice the difference. It will open all Office documents also, but may not be 100% true to the formats depending on how fancy the layout and images are.