The Raspberry Pi 4 brings faster CPU, up to 4GB of RAM | Ars Technica
Raspberry Pi 4 Model B 2GB 4GB 8GB RAM Board 1.5GHz 64-bit CPU WiFi Bluetooth | eBay
Original Raspberry Pi 4 Model B 8 4 2 1 GB RAM + Case + Fan + Heat Sinks + Power Adapter Optional 32 64 128 GB TF Card for RPI 4|Demo Board| - AliExpress
Raspberry Pi 4 Model B - 1 GB RAM : ID 4295 : $35.00 : Adafruit Industries, Unique & fun DIY electronics and kits
The Raspberry Pi 4 gets more RAM for $35 | TechCrunch
Raspberry Pi 3 Model B Quad Core 1.2ghz 64bit CPU 1gb RAM WiFi & Bluetooth 4.1 for sale online | eBay
Raspberry Pi Model A+ 512MB RAM
Raspberry Pi 4 Computer Model B 4GB RAM - Melopero Electronics
Raspberry Pi 4 B (1 GB RAM) | Elektor
Raspberry Pi 3 3B Model B 1G Quad Core 1.2GHz 64bit CPU 1GB RAM | eBay
$98.20 - Raspberry Pi 2 Model B: 1GB RAM 900Mhz ARMv7 Processor - Tinkersphere
Raspberry Pi Compute Module 3+16GB 1GB RAM 64 bit 1.2GHz BCM raspberry pi 3 SODIMM connector supports window10|Demo Board| - AliExpress
Amazon.com: MARSTUDY Raspberry Pi 4 Model B Ultimate Starter Kit -64GB Edition/Raspberry Pi 4B (4GB RAM) /Raspberry Pi OS Pre-Installed : Electronics