This is a good question,
btw, because some people pay too much and raise the price for us regular mongers.
Generally speaking, I give $40 for a
hj, $60 if I think she's pretty 'and' she takes off some of her clothes and lets me play with her; $80 if she takes off her clothes and sucks my dick, and $100 for
fs.
This is a general rule. Sometimes I will give less if I think I can get away with it, like if the girl is not that attractive, or it's a place where the provider usually does not do anything, and she's happy to get a tip over $15. For example, I gave Kim at Golden
Spa in La Palma, $30 for a
hj, and $50 for a
bj.
Also, if the girl gives lousey service, I'll tip less; if she gives me a hard time, I'll say, "next time I'll give you more," which, usually there's not going to be a next time.
One time, I went to this new place, and on the flip, I said to the lady (Chinese), "if you rub junior there, I'll give you $10 more." I could see her thinking, and she thought, "why not?" So, I gave her $15 when she finished, and I was happy and she was happy. I went back a couple of months later, and the whole place changed to legit Koreans.