Finding a reliable 10GbE switch under £100 is a bit tricky, but there are still some solid options if you’re okay with using SFP+ ports instead of RJ45. SFP+ switches are usually cheaper, and you can use SFP+ to RJ45 (10GBASE-T) modules or direct attach cables (DAC) if connecting directly to a device with SFP+ or an RJ45 port via adapter.
Here are a few suggestions:
• MikroTik CRS305-1G-4S+IN – This is often just under or around the £100 mark second-hand. It has 4 x SFP+ 10GbE ports and one Gigabit port for uplink. Fanless and very compact.
• QNAP QSW-2104-2S – A hybrid switch with 2 x SFP+ and 4 x 2.5GbE RJ45. Often £90–£110 depending on offers.
• TP-Link TL-SX105 or TL-SX1008 – These are 5 and 8-port 10GbE RJ45 switches, but typically above £100. Still worth watching for discounts.
If your NAS has SFP+ ports or you’re using a 10GbE PCIe NIC with SFP+ support, DAC cables are by far the cheapest way to get connected — around £10–£15 per cable.
If you’re sticking with RJ45 only and want a true 10GBASE-T switch under £100, you’ll be limited to used/refurb options on eBay. The Netgear XS505M or XS508M occasionally dip into that range used.
https://nascompares.com/2018/01/19/cheap...-switches/