Hi, I don't work at Digitec, but I think it's caused by the cookies on the website. The more people look at a product, the faster it pushes up the price. It's the same with airline tickets. I have experienced it myself.
So maybe: go incognito and surf the net like this ..... and help others to get hold of the product at a fair price. Have fun.
Nadia

Dynamic pricing, also called surge pricing or dynamic price management, is a pricing strategy in which companies adjust prices for products or services based on current market demand. It is a model that calculates prices using automatic algorithms. Factors such as competitors' pricing, supply and demand and other external factors are included. Behavioural science factors must also be taken into account.

I call it a rip-off and is anything but customer-friendly.