The rpi3b is still around. You can also get the rpi zero, rpi zero 2 W, rpi pico, etc.
Get the right one for the job. If you need an M.2 SSD or actual 4k video playback, go for the rpi 5, if not, for sth. else.
Yeah, and it costs over $50 for just the SBC:
https://www.amazon.com/Raspberry-Pi-MS-004-00000024-Model-Bo...
Yeah, and it costs over $50 for just the SBC:
https://www.amazon.com/Raspberry-Pi-MS-004-00000024-Model-Bo...