Hell I'll gladly pay that much because drives like this save money in the long run. They are cheaper and much easier to set up and maintain vs hundred of mechanical drives in a raid setup. In power alone over the live of the drive vs mechanical drives adds up. So $7k isn't that bad and this isn't the most expensive SSD that I have seen.
Hundreds of mechanical drives? Hell a cheap 1tb drive already beats your 400gb $7000 drive. Its not worth the money for slightly better read/write/access time. So, until I can get a 1tb SSD for $129 I will be more than happy to live with the few extra seconds of loading time. Oh and lets not forget the very limited life you get from an SSD, when that SSD dies in 2-3 years a mechanical drive will still be going strong