U.S. President Obama's Kenyan half-brother Malik Abongo "Roy" Obama is selling two handwritten letters from the President to his relatives. He is asking for $15,000 for each letter.

The letters are written on White House stationary and say "thanks for your prayers and support." Both are signed "B.O.," USA Today reports.

Malik, 55, is the son of Barack Obama Sr., with his first wife, according to The New York Post. Mailk lives in the village of Nyang'oma Kogelo, the Obamas' ancestral home. Malik and Baracks were best men at each other's weddings, but their relationship appears "cordial but not overly warm," said U.S. collector Gary Zimet, the man organizing the sale of the letters.

Malik set up an American charity, Barack H. Obama Foundation, to support poor Kenyans in 2008 when Barack was running for president. However, in 2011, Malik was accused of fraud over the charity when a watchdog organization said its nonprofit status was a sham.

"I sent a letter to a post office box in Kenya. I asked him if he had any letters from his brother. I didn't expect to hear from him ever, but he wrote back and said, 'I have two letters,'" Zimet said.

"These letters show great interest on the president's part in his family, they are priced at $15,000 each," Zimet added.

Zimet told the Daily Mail that he believes the letters will sell quickly. "I'm sure the next few days will determine the depth of interest," he said, saying that the main draw was "the scarcity of handwritten letters of Obama."

Zimet has sold 13 similar letters by the President in the past.