i was gonna say you can get two 8gb's for about the same thing since they're both $15 but looking at the reviews i would totally avoid this. ativa is a office depot brand who makes shitty inferior products that won't last, at least according to the reviews...
I seen dell sell these 3000 cores for $129 about three times now, if you absolutely need one I guess its the cheapest you'll get. You can do DPA for an additional 3% off i think.