Raspberry Pi 4 Model B - 8 GB RAM : ID 4564 : $75.00 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: Vemico Raspberry Pi 4 Model B 4GB Set RAM 4GB Base Starter Kit with SD Card, Heatsinks, HDMI Cable, Power Supply, Black Case, Reading Card Device, Screwdriver : Everything Else
Amazon.com: Raspberry Pi 4, Pi 4 ARM-Cortex-A72 4X 1,50GHz, Raspberry Pi 4GB Board, WLAN-ac, Bluetooth 5, 4X USB, 2X Micro-HDMI, Raspberry Pi 4 Modell B 4GB RAM : Electronics