I suggest talking and establishing a short 15 minute friendship before pulling the trigger.

These girls will get as much money as you are willing to pay. I have been asked for a cien once. I have paid cien once for two leches with a girl I would graded her a ten , if only she had not had fake boobs. She was a knockout. My friend who lives in Costa Rica agreed she was the best looking girl he had ever witnessed being in the Del Rey. She was from Venezuela. $60 with a propina or taxi fair is reasonable.