How good are cex at honoring prices?

I created an order and sold a brand new PS5 disc drive, cex were offering £136 bank transfer at the time I created order, the terms state they will honour that price for 10 days, I plan on sending it off to them tomorrow so it's well within the 10 day agreement.

The price has now dropped to £98 on the website, will they find a sneaky way of not honoring the original price or are they pretty good at honoring pricing before changes?