Okay, here's a screenshot. Prices are in roubles. They have reviews so it's certainly k9 pro ess

You said much more expensive model, 800€ is not too far from 700$, it was this price on AliExpress yesterday

There's no mistake https://fiio.eu/product/desktop-dac-and-amplifier-fiio-k9-pro-ess

So you can get old K9 Pro ESS for about 700$ on AliExpress, when K9 AKM is 500$. They are very similar in features, even amplifier should be the same. The only difference is DAC from other company. Looks like the new model is more attractive to buy?

Is there any reason to get stealth, when e3 were released? According to the majority of reviews, they sound almost the same, but the price is twice less. And where did that price difference come from, if they use similar technologies