Prices are inflated in the US, I guess because it's illegal. In the UK you can bang a really hot clean looking escort for like $200.
Good SWE in Europe - $40k-$60k
Good SWE in US. . . . - $250k-$350k
300k+ is, from what I gather, very high for US, whereas 50k is more or less entry level in western EU. But take my impression as a data point (or a cluster), not the ultimate source of truth.