There is also a good chunk of countries with no limit for cash purchases. For example there is no limit on cash purchases in Germany with the exemption for real estate and rent above 10k a month. However it only it only came into force this year and so far it doesn't seem entirely clear of it is constitutional [1].

More interesting in my opinion are new proposed EU laws standardising money laundering laws in the EU, which seems to include a 10,000€ transaction limit for cash transactions...[2]

[1]https://www.lto.de/recht/juristen/b/barzahlung-verbot-immobi... (in German)

[2]https://www.dw.com/en/the-eu-declares-war-on-money-launderin...