Asrock sold a mining rig using reject PS5 APUs, called the BC-250. They're readily available on the used market, although the prices have doubled over the last six months, as is the case worth anything that has a reasonable amount of RAM.

They're binned down a little from the production PS5, but even at full power it's bit the best bang for the buck. For a model that needs 16 GB of RAM, a $100 used AMD Mi25 is the cheapest way to go, and a $200 used 16GB Intel A770 scales that up, at around double the performance for around double the price.