For homeowners who sell their house later in life, that timing may come with a cost, new research suggests. Once sellers reach about age 70, they start getting lower sale prices for their houses compared with younger homeowners, according to a January research brief published by the Center for Retirement Research at Boston College. Compared to sellers in their 40s and 50s, an 80-year-old homeowne r gets a 5% lower price for a house held for about 11 years, according to the study. On a typical