I don't want to undermine the company's advertisement, so everyone should do their own research, but I have never had a problem with 5-digit figures in Europe and the Balkans, and I once received 6-digit figures in the Balkans
This! There are almost no limit and for sure there is no KYC for cash transactions in exchangers from bestchange, as they all use the same network of "cash providers" around the globe, they are just middleman. I have done a lot of those transactions in EU, mostly 6 digits. After first transaction, you can easly get direct contacts. They have closed telegram group(couple, with different levels of trust), where people have long term reputation, however you need to speak some russian.