alibaba is difficult. i have seen a few genuine sites on alibaba, but few and far between. no i've never ordered from them directly though.
always check out their contact details, look for an actual website and find out how they ask for payment. if its something like western union or a similar thing that offers no underlying safety then stay very far away.
some of them expect you to buy in bulk as well.
and many of the stores are 'grey' import stores.
here is the website for that particular mob
http://www.bdkcarbon.com/and i see a note on the website that is maybe of some concern
"The previous staff Jessica (whose Chinese name is Yang Li Luan) had already left the company on April 31, 2010. We are derelict of duty anything about her. Anyone (especially all our old customers) who want to talk about the business, please kindly contact the following salesman. Thanks"