Question about Philips Sonicare DiamondClean Smart 9400

I discovered this toothbrush for CHF 167 at about 5 o'clock today and noticed it. Now at 10:30 I wanted to finalise the order and lo and behold: now it's suddenly going to cost CHF 239. A price jump of CHF 62 within a few hours. In my eyes, this is an arbitrary rip-off. The "transparency" of the price development doesn't help either. What is Galaxus thinking with such arbitrary price increases? There were 10 pieces in stock around 5 o'clock and there still are. A new delivery at a higher purchase price cannot be the reason.