New York ( CNN ) -- The family of Sarai Sierra , an amateur New York photographer recently killed during a vacation in Turkey , is selling her photographs online to help support her sons . The images went on sale Tuesday on a marketplace website called Instacanvas , and proceeds will go to her two sons , ages 9 and 11 , according to family friend Marjorie Ryan . The money was originally intended to pay for Sierra 's funeral services , but `` the funeral home has now agreed to take on the costs , '' Ryan said . Sierra traveled alone to Istanbul on January 7 . She was reported missing after she did not arrive on a return flight January 22 . An estimated 9 million people travel to Istanbul each year . After a rigorous two-week search , Turkish police found her body near ancient stone walls in Istanbul 's Sarayburnu district on Saturday , the semi-official Anatolian Agency reported . Body of Missing N.Y. mother found in Turkey . Police suspect that she was killed at another location . They told CNN 's sister network CNN Turk that the body of the 33-year-old Staten Island mother showed signs of stab wounds . But authorities said Sierra died from a blow to the head . Turkish police have detained a Turkish man with whom she had been in contact , identified only by the first name Taylan , according to CNN Turk . Authorities have also collected DNA samples from 21 people , including three foreigners . Her body has since been transferred to Istanbul 's Ataturk Airport for a Thursday departure to New York . The medical examiner 's office is expected to release the results of an autopsy in about three months . CNN 's Ivan Watson and Talia Kayali contributed to this report .
Proceeds from photo sales will be used to support Sierra 's sons , family friend says . Comment: An estimated 9 million people travel to Istanbul each year .