I bought the 4gb model white official kit from Black Friday. It didn't cost me more than my first Raspberry Pi 3B official kit. Since i compile a lot and create scriptmodules for RetroPie I wanted the 4gb model to use for developing.

The kit was bought from a german seller on Ebay for 75,92 EUR:
1 x official Raspberry Pi 4B 4GB Board
1 x official Raspberry Pi USB-C power supply 5.1V / 3.0A, EU, white
1 x official Raspberry Pi 4 Micro HDMI cable, white, 1.0m
1 x official case for Raspberry Pi 4, red / white

At the moment it runs a stable Lakka release on a Kingston Canvas Select 128 GB Micro SD card and i tried Super Mario All-Stars. It runs great.