Amazon with miibuy has the 1mii Miilink 802.11ac 1200Mbps Wireless USB Wi-Fi Adapter for PC with Dual 5Dbi Antennas for $8 with free shipping on $25+ or with Prime.
Best Networking Deals, Routers on Sale, Mesh Wi-Fi Discounts
Amazon has the TP-Link Archer AX21 AX1800 4-Stream Dual-Band Wi-Fi 6 Smart Router, Works with Alexa (2020 model) on sale for $100 with free shipping.
Shell Shocker! Today only. Newegg has the ASUS RT-AX92U AX6100 Tri-Band Wi-Fi 6 Mesh Gigabit Router with 802.11Ax, AiMesh Compatible, Adaptive QoS & Parental Control for $200 - $20 off with code 93XQE76 [Exp 1/26] = $180 with free shipping.
Newegg has the NETGEAR XS505M 5-Port 10G Multi-Gigabit Ethernet Desktop/Rackmount Unmanaged Switch for $400 - 20% off with code 28UPTNP344 [Exp 1/18] = $320 with free shipping.
Add quantity of 2 to cart (10-pack total) to reach $17.98 - $4.98 off with coupon code SLM7 in cart = $13 with free shipping (select Monoprice Saver).
The 5-pack 10 ft. length is $9.99. Add two to cart (10-pack total) for $19.98 - $4.98 off with code SLM10 in cart = $15 with free shipping (select Monoprice Saver).
Has up to 800+1733 Mbps in 2.4GHz & 5GHz, dual core processor, and 4x4 data streams.
Newegg has the TP-Link T2500-28TC/TL-SL5428 24-Port 10/100Mbps Jetstream Managed Switch with 4-Port Gigabit L2 Managed Switch for $50 with free shipping.
Has simultaneous 2.4GHz 450Mbps + 5Ghz 1350Mbps networks, 800MHz dual-core processor, 1 x USB 3.0 and 1 x USB 2.0, built-in print and media servers and beamforming to create stronger connections.
Ends 12/30 at 9PM PT. B&H Photo Video has the refurbished TP-Link Archer A7 AC1750 5GHz Dual Band Gigabit Smart WiFi Router with Alexa, Parental Control & QoS on sale for $28 with free shipping.
Amazon has it for $80 with free shipping.