You can try getting a used Kirsten doll from ebay, because I highly doubt you can find a brand new Kirsten for under $150 :)
Kirsten Heisig's birth name is Kirsten Ackermann.
Kirsten Gillibrand was born on December 9, 1966.
Kirsten VanWagner's birth name is Kirsten Julia Toth.
Kirsten Dunst's birth name is Kirsten Caroline Dunst.
Kirsten Storms's birth name is Kirsten Renee Storms.
Kirsten Lehfeldt's birth name is Kirsten Eli Lehfeldt.
Kirsten Gronfield's birth name is Kirsten Elise Gronfield.
Kirsten Haglund's birth name is Kirsten Lora Haglund.
Kirsten Flagstad's birth name is Flagstad, Kirsten Malfrid.
Kirsten Vangsness's birth name is Kirsten Simone Vangsness.
Kirsten Lindholm's birth name is Kirsten Lindholm Andreassen.