Walmart offers the Hellraiser Collection on Blu-ray for $9.49. (Amazon charges the same with free shipping for Prime members.) Opt for in-store pickup to dodge the $5.97 shipping charge. That's the lowest price we could find by $4. It includes Hellraiser 4: Bloodline, Hellraiser 5: Inferno, Hellraiser 6: Hellseeker, and Hellraiser 7: Deader.

Update: The price has dropped to $8.96.