Hi!
Very important information: Google is not the only browser in the world.

And at the same time - at least from the perspective of someone who wants to regain a preview of the archival announcement on olx, otomoto or other otodoms - not necessarily the best. In the post above, I described my problem and mentioned that google, angrily, did not save a backup of the page I was looking for.
On a daily basis, I don't use Google anyway, only GoDudckGo - I respect my privacy - but unfortunately there is no such thing as a copy of the page. It's a pity ... But then I had an epiphany: there are other options.
I started with Yahoo, and there it actually found the backup copy of the ad I was looking for, only it was heavily obscured by some blank squares and thus almost useless - almost, because luckily the ad ID number - which is all I could ask for - was visible. So much to win.
And this should be enough for you too if you want to report a scam and need to provide your ID to the relevant authorities so that they can report to these platforms for the content of the scam ad. And if it hasn't been six months since this ad was archived.
However, I decided to check other possibilities and... Bingo!
On Russian Yandex, I found an elegant, comprehensive copy of the page with the ad and all the lies that the Seller was writing there. I wrote it down, took screenshots and now I have everything documented, you can take a cheater for a face.
As it's in Russian, I'm leaving a quick user manual:
1) you search for Yandex in any way and launch this search engine
2) In the search engine (not the address window at the top of the browser) you put the link of the advertisement that interests you.
3) In the search results, the advertisement should pop up in the first place. You click the three vertical lines (menu) next to the ad.
4) Four options will pop up, all in Russian. I only say "Kalinka, Kalinka Maja" in Russian - and falsifying it - so I checked them one by one. All you need to do is click on the second one from the top. A copy of the ad should pop up.
5) right-click, give "save page as..." or something like that, probably depends on the browser, take screenshots and whatever you like.
Of course, there is no guarantee that this will also work in your case, but it's definitely worth a try. And if not these, there are other browsers, one of which will eventually work.
Good luck.
P.S
Avoid the type operating on olx.pl under the nickname Seller, who lives in Pawłowice near Poznań. And definitely don't buy a car from him.