If you are looking for an RPi4 this site will likely be useful [1]. For many places outside the US they have been reasonably available again for quite a while.

If you are looking for an RPi4 this site will likely be useful [1]. For many places outside the US they have been reasonably available again for quite a while. In the US they have been popping in and out of availability every few days for the last couple of weeks at Digi-Key, Adafruit, Chicago Elec. Dist., and Pishop. Here's the listings link for RPi4 in the US at that site [2] [1] https://rpilocator.com/?cat=PI4 https://rpilocator.com/?cat=PI4 [2] https://rpilocator.com/?country=US&cat=PI4 https://rpilocator.com/?country=US&cat=PI4