For korean I think its above 1.8k hkd pershot but imho I think better call 2 shot or something rather than over nite. Most of the listed korean are probably non korean but chinese that stay near to the korean penisular hence they can speak some korean.
Stay away from russian or european girls here in hk. If u read through the thread u notice how many negative report there is about european girlS.
Stick to chinese or other asian wgs like thais/indonesian/Filipino at least u get better service and come out as happy man instead feeling like shit after the deed. Thats of coz my honest opinions.