Hey I am currently building my own rigs for sale. They are $3,000 each pre built with custom mining software pre-installed, but you can also purchase all the pieces separately. The mining rate is 179 MH/s which is one of the best rates for this cost. You can contact me through WhatsApp at 1-919-624-3675 to learn more about my products. I would also be glad to help you with any other issues you might be having with mining ethereum.