I bought an Ebang Ebit E9+ in November that I've yet to actually be able to use.  Had to pay delivery both ways for them to "repair" a controller and they didn't repair it.. the system literally has never connected to the internet so I have a brand new E9+ that needs a controller or an owner with more tech savvy and patience than I.. I won't buy from Ebang.. so if you have either, contact me and make a deal. If you want a new E9+ that needs a controller, you can have for $250 or equivalent in crypto currency.  If you have a controller that needs a new owner, let me know what you're asking for it.