I pulled them from two complete in-box Asrock 4u12g servers that have been sitting on a shelf. You will need to provide adequate cooling for the card. These are repurposed boards running custom firmware built by an amazing community of contributors.
ASRock AMD BC-250 16GB 128GB SSD Used
ASRock AMD BC-250 16GB 128GB SSD Used w/ Modded Bios
ASRock AMD BC-250 - AS IS FOR PARTS
ASRock AMD BC-250 16GB GDDR6 Mining Card
ASRock AMD BC-250 16GB Used with BIOS for RAM
ASRock AMD BC-250 Mining APU (Grade D)