Price increases and update Oct. 21
... a shortage of some products, notably Raspberry Pi Zero and the 2GB variant of Raspberry Pi 4."
"... We’re now expecting our supply chain challenges to continue through much of 2022. These challenges will fall most heavily on our older products, built on 40nm silicon: in practice, anything that isn’t a Raspberry Pi 4, Raspberry Pi 400, or Compute Module 4.
2GB Raspberry Pi 4 temporarily moves back up to $45
1GB Raspberry Pi 4 makes a comeback at $35
" we expect to have enough 28nm silicon over the next twelve months to support both our existing Raspberry Pi 4 and Compute Module 4 customers, and customers migrating from Raspberry Pi 3B+; and that we see early signs that the supply chain situation is starting to ease."