They'll assume you're cheap. So I suggest you just look for girls at the price point you're comfortable with and leave it at that.
Of course, if you're a P411 member, you can check girls' listings to see which ones offer a discount to members. A fair number do. That's a safe way to get a discount.

Some do, based on the time of year, or for whatever reason, but the lady determines her worth.

I believe Nicki Burgess does birthday specials. Look her up, works out of NJ

I LOVE BIRTHDAYS TOO!!
I'm hanging out in NYC until Tuesday, come visit me!!
Love, KatieC*

I’d love to offer you a birthday special

Let’s celebrate your birthday together!