Amazon offers Prime members Frankenstein: Complete Legacy Collection on Blu-ray for $16.99 with free shipping. That's the lowest price we could find by $11. It includes eight films released between 1931 and 1948.

They also have The Wolf Man: Complete Legacy Collection on Blu-ray Disc for $16.99 with free shipping for Prime members. That's the lowest price we could find by $7. It includes seven films released between 1935 and 1948.