With the launch of the Raspberry Pi 2, the pricing of the old B+ felt a bit out of shape. For $35 you got either the newest model with ARMv7 and far more CPU power, or the older B+ with some additional ports.
Now the Raspberry Pi Foundations has announced some adjustments to the pricing. The new setup means that Raspberry Pi 2 retails at $35, Raspberry Pi B+ at $25 and Raspberry Pi A+ at $20.
This has been made possible through production optimizations, but I would guess that outselling even the most optimistic forecasts might have something to do with it as well. The end result is a pricing for the B+ and A+ that feels more accurate, given the price tag on the Raspberry Pi 2 – and, of course, cheaper pies for everyone.