The price didn't soar immediately, according to the sources, because Sarah Palin stories just didn't sell all that well for the weeklies on newsstands.
The drug-related arrest of Johnston's mother, however, caused the price tag for the photos to go up.
People magazine reports that Bristol Palin, daughter of the Alaska governor, has given birth to a baby son:
Bristol Palin, the 18-year-old daughter of former Republican vice-presidential candidate Sarah Palin, gave birth on Sunday to a healthy 7 lb., 4 oz., baby boy in Palmer, Alaska.
"We think it's wonderful," said Colleen Jones, the sister of Bristol's grandmother Sally Heath, who confirmed the news. "The baby is fine and Bristol is doing well. Everyone is excited."
The baby's name is Tripp Easton Mitchell Johnston, according to Jones.
The baby's father, Levi Johnston, is training to be an electrician. Bristol is taking correspondence courses to obtain her high school diploma. The couple has been together for three years.