I asked the same question a couple of weeks ago. At first I went to a music instrument store which was a bad move $86. I later canceled that order. Then someone said something about that Ebay shit, another bad move. Both chip were old and don't work. Finally, I went to a computer upgrade store and bought both for 20. Look in the yellow pages under computer then call to see if they have 16mb 72pin simm chips (EDO).