You cannot add "Cisco Catalyst 9300 - Network Essentials - switch - Managed - 24 x 10/100/1000 - rack-mountable" to the basket because the product is out of stock.
Cisco Business 220 Series CBS220-8T-E-2G – Switch – smart – 8 x 10/100/1000 + 2 x Gigabit SFP (uplink) – rack-mountable