Inflation arguments don't really work for a lot of people's income. Check people's actual salaries versus inflation and why companies find it so important to get consumer electronics below the $200 barrier.
Computers in schools aren't used for programming anymore. It went the way of vocational programs since teachers are not hired to teach it specifically and a generalist cannot. Computers are web browsers, readers, and run specific education software.
There is a need for that Sinclair / Commodore price and it has been replaced with iPods and smart phones.