HP J9280A PROCURVE 2510-48G SWITCH - J9280-69001
For this 125-node cluster I needed a ton of Ethernet ports without spending crazy money, so I grabbed these older HP ProCurve 48-ports off eBay for about $25 each. They’re a solid way to get the switching you need for a big SBC cluster build and keep the budget focused on the actual compute.
You'll be taken to Ebay to complete your purchase.