I have 4 x 2 GB sticks (matched pairs) of Mac Pro 1,1 RAM for sale 667 GHz, heat sinks...
These are brand new, as they are being replaced under warranty, and can be proven with RMA documentation. I just received some 4 GB RAM sticks from a friend -- I have enough, or willing sell the 4 GB sticks perhaps.
Let me know, I can provide seller's reference to MacNN members upon request.