Willing to purchase used rails for Chinese company

We're the authorized supplier chain enterprise in mainland China, and is responsible for the thirdparty purchasing and the supply chain management.
We hereby declare and confirm that we are ready, willing and able to purchase the commodity described below,
The Rails used Steel Scrap ISRI R-50 & R-60 (51.67 Kg/M-GOST-7173-75), R-65 (64.72 Kg/M- GOST-8165-75).
Please revert with the detail requirements about price of commodities, payment, quantity, and the periods of contract.