Ocean Technology via Amazon offers Prime members the Unitek USB 3.0 Gigabit Ethernet Converter with 3-Port Charging Hub in Black, model no. Y-3074ABK, for $21.99. Coupon code "LEFPAYAG" drops it to $10.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $8.15.) That's a buck under our January mention in another color, $39 off list, and the lowest total price we could find. It features a Thunderbolt 3 adapter.