What a good price for 1950 to 1969 half dollar worth?

with no mint mark; 7$ in very fine condition, 9$ in extremely fine condition, 12$ in low grade uncirculated condition, in uncirculated condition 20$, in high grade uncirculated condition, 25$, and if proof, 250$.

with D mint mark; all same, no proofs

with S mint mark; 8$ in very fine condition, 10$ in extremely fine condition, 50$ in low grade uncirculated condition, 70$ in uncirculated condition, 100$ in high grade uncirculated condition no proofs