Had a quick look and prices seem to range from 1500 - 4000 AED an hour (approx $400 -1100) which is expensive in Dubai where its still possible to get a nice Chinese GFE all night for $150 to $200
Also a report on this site on the UAE pages indicates there is a very high risk of bate and switch!
But as 11Bravo (where is he these days?) used to say its what that experience was worth to you on that night.
I recently blew around $500 on an hour with a couple TGs in London. Just what I needed at that time so it was worth it to me.