DALLAS -- A small nook off a dining room with just enough space for a twin bed has made a Dallas boarding house a point of fascination for the last 50 years, because of one man who occupied it for about six weeks in 1963: Lee Harvey Oswald.

The house has been in Patricia Hall's family since about 1942, but she has decided that it's finally time to let it go – as long as a buyer wants to preserve it and offers the right price for the onetime home of the accused assassin of President John F. Kennedy.

"I understand the significance of the history of this house," said Hall, 61. "It doesn't matter if you believe in a conspiracy or the lone gunman. The fact is that Lee Harvey Oswald lived here."...