https://arstechnica.com/gadgets/2021/10/supply-chain-woes-lead-to-a-temporary-raspberry-pi-4-price-hike/

Pandemic-driven supply chain problems have prompted the first-ever price increase for a Raspberry Pi product, according to Raspberry Pi founder Eben Upton. Acknowledging that the 2GB configuration of the Raspberry Pi 4 and the Raspberry Pi Zero had been particularly hard-hit by shortages, Upton announced that the price of the 2GB Pi 4 would increase from $35 to $45 and that a previously discontinued version of the Pi 4 with 1GB of RAM would be reintroduced at $35.