Are you aware that 512MB Corsair SODIMM RAM models - brand new, sell for under $130?
http://www.auspcmarket.com.au/ (go to memory -> Sodimm)
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Corsair 512Mb PC2100 DDR266 SODIMM memory, for Dell, HP, Compaq, Gateway, Toshiba, IBM, and Sony Laptops
CMSS512MB-266SOD</TD><TD class=greyThinBorder width=80>
1 - 2 days</TD><TD class=greyThinBorder width=80>$126.50
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Also AusPCMarkets are a great store but not the cheapest (Try
www.fluidtek.com.au for even better PC prices on start of the art gear normally).