Not a bad deal I think. The disks themselves (84x10TB SAS3) are worth almost the asking price.
84x 10TB SAS3 DDN Storage Scaler SS8460 4U 84 Bay LFF JBOD Storage Expander Rail | eBay
84x 10TB SAS3 DDN Storage Scaler SS8460 4U 84 Bay LFF JBOD Storage Expander Rail | eBay