SHAYBANID: Muhammad Shaybani, 1500-1510, AR tanka (5.12g), Sarakhs, ND, A-2978.2, very rare mint, with uncertain countermark (assigned by some to the Mughal emperor Akbar, but that seems unrealistic, some sort of Shaybanid countermark is more likely), VF, RR.
Estimate: 100-150 USD