How low could the Raspberry Pi mini computer’s price-tag go in future? Eben Upton, founder of the not-for-profit Raspberry Pi Foundation and the man behind the Pi’s design, says that while he can’t envisage being able to make a $10 or $15 Pi, there might be room to shave a few more dollars off the cost – “one day for a very bare-bones product, but not soon” – and no lower than $20.