Dell OptiPlex 3070 Desktops – Refurb Grade A, Win 10 Pro, Small Form Factor, 8GB Mem., 128GB SSD. While supplies last. (supports Win11) $79

30+ available at the time of this post. While the processor isn’t a speed demon, it is on the list of processors that do officially support Windows 11.
https://www.dellrefurbished.com/cheap-computers?model_f=OptiPlex%203070