RDRAM - OT

Hey I want to upgrade my comp to a gig of memory. Of course I have a Dell and they use the most exspenvie memory RDRAM. I have 2 dimms of 128 already. I was wondering if anyone knew of a cheap place to get a gig. From 4 dimms of 256 or 2 dimms of 512. It also needs to be PC800. I already looked on pricewatch tomshardware.com price finder and ebay.

Thanks
nuke