After upgrading my PowerBook, I have left over a 256 MB stick of (Hynix, Apple-installed) PC2700 DDR 333 MHz CL 2.5 RAM. As this is part of the standard quantity that comes with a PowerBook, I can't imagine why anyone would need it, other than to replace a failing stick.
Never the less, it's available and performs flawlessly. I used it day in and day out for the last 2 years, and I'm confident that it will serve your needs as well. It will be shipped in an antistatic enclosure to ensure its safe arrival.
$15 + ship.