MicroBT Whatsminer M30s 90T. I have six of these, one is an M31s 86T, one of them doesn't power up. I also have five 8" 831cfm inline duct fans that can be remotely controlled and 3d printed adapters to reduce noise level. Also have PDU's and power cables for L6-30P outlets. Also have two large 24-30" fans one louvred one regular fan.
$200 each for miners, $100 for non-runner
$50 each for fans and PDU's
Applicable cables thrown in