Shut the Door, Have a Seat - S3-E13
Continuity mistake: When Christina Hendricks is about to leave the office, while talking to Don, she is wearing a scarf on her hair. The scarf corner is tucked in her coat collar and then outside, and inside again etc. in alternate angle shots of the scene. (00:38:00 - 00:39:00)
Chosen answer: At that time, call girls did not command the same amount of money as they do today. By that standard, the $25 would be considered a high rate. Today's upper-level prostitutes can demand far more for their services.
raywest