Raspberry Pi 4 is released:

- A 1.5GHz quad-core 64-bit ARM Cortex-A72 CPU (~3× performance)
- 1GB, 2GB, or 4GB of LPDDR4 SDRAM
- Full-throughput Gigabit Ethernet
- Dual-band 802.11ac wireless networking
- Bluetooth 5.0
- Two USB 3.0 and two USB 2.0 ports
- Dual monitor support, at resolutions up to 4K
- VideoCore VI graphics, supporting OpenGL ES 3.x
- 4Kp60 hardware decode of HEVC video
- Complete compatibility with earlier Raspberry Pi products

1GB RAM = $35 retail price
2GB RAM = $45 retail price
4GB RAM = $55 retail price

Prices excluding taxes.9

https://www.raspberrypi.org/blog/raspberry-pi-4-on-sale-now-from-35/