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Amazon [amazon.com] has TP-Link 5-Port 2.5G Unmanaged Ethernet Switch for $34.99.
Shipping is free with Prime or on $35+ orders.

Newegg [newegg.com] has TP-Link 5-Port 2.5G Unmanaged Ethernet Switch (TL-SG105S-M2) for $34.99. Shipping is free.

Cashback
15% back with Prime Card Bonus [amazon.com] (click to check)