Cheapest ITX AM5 motherboard, the next cheapest board is the Gigabyte A620i AX for $218 which has a potato 5+2+1 VRM. JGINYUE is an AMD partner and recently released Ryzen 9000/Zen 5 support with a BIOS Update (Instructions are in Chinese unfortunately). Would go well with a budget CPU like a 7500F, however you should be able to run 7950X/9950X if you really want to.
I was able to get about $0.93 USD off with coins.
Specs:
AMD B650 Chipset
1* PCIe 4.0 x16
2* DDR5 Slot
2* M.2 Slot (Front and back)
4* SATA3 6Gb/s
8+2+1 Power Phase 55A Dr.MOS
Realtek RTL8125BG 2.5G Ethernet
Realtek ALC897 Audio
Supports M.2 WiFi (includes the bracket but no antennas or WiFi card), Intel WiFi card recommended
Have to buy two but still cost efficient.