Don't forget, EU prices include sales tax. Online shopping in the US doesn't (as I understand it).

However, in the UK, there are Chromebooks for around £120 - https://www.currys.co.uk/computing/laptops/laptops/chromeboo...

Yeah but sales tax in the US is still way lower than your average European VAT and varies by states. Several states have no sales tax at all (New Hampshire, Delaware, Montana, Oregon, Alaska).