I'm looking to buy S9 hydro control boards. I'll pay $60 for new or like new boards, otherwise $40 for any working S9 hydro boards. Should look like this:

https://www.eastshore.xyz/wp-content/uploads/2019/03/Evaluation-on-Antminer-S9-Hydro-Water-Cooling-Bitcoin-Miner-IMG-07.jpg

I don't mind paying up front if you have a good reputation here, otherwise I'll require you to send first or arrange for escrow. Reply to thread and/or PM with any offers. Thanks!