Buying used rails R 50, R 65, 15 000 tons monthly, CIF Turkey

We would like to buy second quality used railways R 50 - R 65. Chemical Composition:
MN: 0.60% - 1.05%;
C: 0.54% - 0.82%;
Si: 0.18% - 0.40%;
S: 0.04% max;
P: 0.035% max;
AS: 0.01% max of mass share.
Specification: Used rails: R 50 (51.76 kg / meter, GOST 7173-55). Used rails: R65 (64.72 kg / meter, GOST 8161- 75).
Delivery term : CIF Istanbul, Turkey.
Shipping method: container or bulk.
Payment terms: Irrevocable letter of credit at sight.
Quantity: 1000 tons for a test order.
Our monthly quantity is 15000 tons.
Please send your offers with a test report.