I have been looking for this item for quite some time, I believe this is the cheapest I have seen. Enjoy!!
Seagate IronWolf 4TB 3.5" NAS Internal Hard Drive
3 Years Seagate Rescue Service
Seagate IronWolf 4TB 3.5" NAS Internal Hard Drive is always on and always working, IronWolf is enhanced with AgileArray™ technology for optimal reliability and system agility. Multi-user technology and extreme workload rates allow IronWolf to perform and scale up with your enterprise.