Hello!
Glad to hear your thinking of upgrading to the antminer s7! If you're looking for somewhere to purchase it Dragon Mining is now happy to offer the Antminer s7 and s9. Our team keeps track of the market's mining technology and we highly recommend this machine.

Visit our website for more info
www.dragonmining.net

If you have any inquiries please get in contact with us at
info@dragonmining.net