I would probably pass on Mr. $500 due to the upcharge. If one escort is taking care of two clients at once, that might justify an increase. In your case, however, he's out of line. Judging from their RM ad text, one of them is not 100% fluent in English. Could this be a misunderstanding about what you're asking? Maybe a frank conversation as someone else suggested would clear things up and open the double doors of Nirvana? Interesting situation; please keep us posted.