One lady tried to increase the price when I was on the phone for a 2 hour. apointment I told her no deal. Then she wanted to negotiate down to price posted in her ad.  I told her ok, that should would have to agree to let me use toys on her and put restraints on her. She said no problem. She came and we had a good time. I was able to chain her to the bed, put ballgag, blindfold, and have greek with her, lol. She started out giving me nice DFK and bbbj to get me going. When she left was glad that I did not torture her and that I was nice.

But I am with you, I like the total up front, no more discussions, no more expectations.  Had one provider once offer me a special return customer rate.  Of course she forgot next time so I had to remind her.  But she was cool after I reminded her.  Then it happened again with her the following time.  

I have another lowered return customer offer in my PM inbox from a different provider I like.  That PM I am definitely keeping so next time I can PM her as a response to her offer.