I've been playing with the idea for a bit, can you give me an order of magnitude for "entry-level HiFi"? Even if that's an oxymoron, how many zeroes does it take to get an experience that's noticeably superior to, say, default car speakers or built-in Smart TV speakers?
It doesn't usually take much, because very few cars or TVs come with powered subwoofers or 6x9s or quality tweeters. Second hand amps, receivers, etc. are usually a good deal, entry-level speakers are pretty cheap new though.
Better than smart TV speakers? That's a low bar.
A $40 Bluetooth box from any big name brand is better than the speakers in a smart TV.
It's like buying a gun or a car, there are all kinds of offers and all kinds of prices. You should be able to find great offers with amp+speakers under 1k€, including VAT. Probably even less with 2.0 or 2.1 systems.