Price is 15 BTC per unit or 56 BTC for all 4 units.

The price includes 6 months of hosting from the purchase date.

Access to the boxes is possible via a simple password protected URL. The hosting company will also be notified of the same should you want to have the boxes returned to you rather than continue to host them after the 6 month term is up.

Cheers...

EDIT - New prices of 13 BTC with hosting and 11 BTC without (shipping not included)