Found another impossibly cheap 2.5G switch. This ones under $35 with the 5% code today.
STEAMEMO 6-Port 2.5G Unmanaged Ethernet Switch, 4X 2.5G Base-T Ports, 2X 10G SFP, 60Gbps Switching Capacity, Compatible with 100/1000/2500Mbps, 2.5Gb Network Switch for Wireless AP, NAS, PC https://www.amazon.com/STEAMEMO-2-5G-10G-SFP-Compatible/dp/B0CYGXM1B4/
STEAMEMO 6-Port 2.5G Unmanaged Ethernet Switch, 4X 2.5G Base-T Ports, 2X 10G SFP, 60Gbps Switching Capacity, Compatible with 100/1000/2500Mbps, 2.5Gb Network Switch for Wireless AP, NAS, PC https://www.amazon.com/STEAMEMO-2-5G-10G-SFP-Compatible/dp/B0CYGXM1B4/