I bid $25 on 6 x 128MB FPM 5V (PCI Powermac RAM) today thinking nobody would want it, went for $90. You can never have too much RAM even if it is obsolete. I could use some 2GB DDR2 DIMMs too. DDR1 is still kind of pricey so don't expect DDR2 to get super cheap anytime soon.

Seems like all the obsolete cheap RAM on ebay that is sold as NEW comes from China, never had an issue with it (been buying PC100 256MB low density SODIMM for like $4 a piece shipped lately. 512MB PC133 DIMMs are kind of cheap now as well if you want to max out that G4 Tower.