If a Steam Deck 2 costs more than 1000 euro/usd, I’m not interested. The original Steam Deck was interesting to me because it was cheaper than a gaming PC.

True. For example, not having to worry about drivers, UEFI updates and linux compatibility is a big win.

You can probably build a DDR4 system that is a bit cheaper with better performance. It will be even easier if you pick some used components.

Edit: See this screenshot from a gamernexus video on the steam machine. Pricing is pretty much on par, with just a $70 price difference.