Innosilicon is offering "manufacturer refurbished" T3+ and other miners.
I ordered a T3+ 57T Bitcoin miner.
I had to wait for 4 weeks after I paid in full in Bitcoin until they shipped it out.
When it arrived it was in horrible condition: https://youtu.be/Wml5bBvFy4g

Full of dust, with scratches, stains, missing screws, rattling parts, rust...
The firmware was locked and I was not able to enter my own pool settings.

There was plenty of evidence that this miner was not manufacturer refurbished, not even cleaned. Otherwise at least the firmware would have been reset.

Innosilicon has 3 departments: while the support is trying to help to unlock the miner, the sales and order team tells me:
"This is what you get when you order from us. Deal with it!"