Raspberry Pi
Not an edible kind of pi
The Raspberry Pi is a series of small single-board computers, and here are some of them:
Raspberry Pi 4 Model B
The newes raspberry pi, better than rpi 3 and only 2$ more expensive
Raspberry Pi 4 Model B 4GB
The best raspberry pi with 4GB of RAM for some emulator games. A bit more expensive but still not 100$
Raspberry Pi 3 Model B+
The slightly cheeper but not as good raspberry pi
Raspberry Pi Model B
The cheapest doesn't mean the best
Raspberry Pi 3 with touchscreen
The one you saw at Power and thought it was expensive
Raspberry Pi 3 Model A+
Just don't