The drawing for the St. Jude Dream Home is Saturday.
Chairman Mark Cantrell said the only way to buy a chance at the $350,000 house now is by calling 1-800-383-9844.
"We've pulled the tickets away from the various locations," said Cantrell.
He said that because of lower than usual sales that a buyer's chances "are better than ever to win some kind of prize."
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Cantrell said only about 5,000 of the $100 tickets have sold instead of the usual 8,000 but that sales have gone well this week.
Some of the many other prizes are a $1,500 gift certificate from J.D. Kinder's Furniture, a $5,000 blue diamond pendant from The Jewelers Touch, a Kenmore refrigerator from Sears Commercial, a wooden playset from Action Truck Styles and dry cleaning for a year from Wade Cleaners.