if you check pricewatch, they're up to about $35 for 256MB of generic ram in a 16x64 configuration that generally only works on VIA chipsets... 64x4 ram generally costs a few bucks more (which is what this stuff probably is).
16x64 is 128MB, 32x64 is 256MB.
the one doesn't work with intel chipset, so-called high density is 32x4 or 64x4 chip,
the one more expensive, work with every chipset, standard type is 16x8 or 32x8.