I think 8 is £450 and the 8 Pro £500 direct, Amazon has one combination of colour and memory that is £405 for the 8. 8a is £50 cheaper but I feel like it's maybe worth it to spend a bit more for the 8 to last a bit longer...?
Edit. it's new but a return hence the 10% off...hmm
8 direct from Google is the same price I think