I'm looking to upgrade my AGP G4 to something faster than 350MHz; alas, the only vendor that sells G4 upgrades is Sonnet, but their Duet is not compatble with the rev 3 G4 350. I've occasionally found a 400MHz on eBay, but it hardly seems worth $150 to inch up a mere 50MHz. Any of you selling your unused G4 processor or know of a place that sells them?