Where can I buy the Maxtor model: 7y250po, code: kmbd of 250g hard drive?

Where can I buy the Maxtor model: 7y250po, code: kmbd of 250g hard drive?
Of second-hand can be good! ! ! Beijing where to sell it?

Model: 7y250po, code: kmbd of 250g hard drive?
Of second-hand can be good ! ! ! Beijing where to sell it?