I just searched an Avios reward trip LON-FRA, on BA next week, economy return. I expected it to be 8000 avios (4000x2). Instead it was 17000, which is ridiculous for such a short trip to Germany. The dates are marked "off peak." Why is it 17000? Can I get it for 8000?
It is probably 17k + £1. You should be able to get it for the usual 8k + £35 if you scroll through the options.
It’s always worth comparing all of the payment options. Depending on your personal Avios valuation you will probably find it worthwhile to pay more £ - equivalent to buying Avios at a cheap rate.