The two diaries, written in 1992 and 1994 by the former Playboy Playmate of the Year, reveal Smith's fears about meeting the head of Guess? jeans and her concern toward her then-husband, the Texas oil tycoon J. Howard Marshall II, the Los Angeles Times said Friday.
A German businessman paid more than $500,000 for the journals last month during an online auction on eBay. The diaries were consigned to Heritage Auction Galleries in Dallas, which scheduled a live auction April 14-15.
In one diary, Smith expresses anxiety as she prepared to meet Paul Marciano, the head of Guess?.
"Please God let him love me!!," she wrote. "This could be it. (Followed by five smiley faces.)"
Billionaire Marshall was ill when Smith wrote in 1994: "Sometimes he tries to smile and give me such hope, he a fighter and I believe he can make it. If Jesus (decides) to take him I (don't know) what I'll do. I love him so much."
2014: The Year in Music [PHOTOS]