Interesting. A lightly used, high-class call girl is $280-$380 which is obviously much less than the Tinder subscription and you're actually guaranteed sex each month.
Not sure where you live, but I would probably double that range.
$500-800 is where I would roughly place it for "high class".
That's illegal in many countries. In the US, where it is illegal, the cost would be $2000 USD. Plus, there are people interested in real love on Tinder and that can't be bought directly for any amount.