I won't, either.
Wal-Mart and other discounters don't usually carry my cartridges. Sigh. . .
search for ink at newegg.com. They may sell it....mine is a bit cheaper, though not a lot from my recollection.
I could simply get a new one that copies, prints, and faxes for 70 bucks. http://www.newegg.com/app/ViewProductDesc.asp?description=28-106-159&depa=1
Not much more expensive than refilling.