I always assume the people that do this saw that report a few years ago about how real-tors list houses at odd prices to stand out because brains look for differences and group similarities.
So rather than getting your house "grouped" with all of the other $24,000 house your brain makes a separate category for your $24,851 house, and therefore you stand out and are more memorable.
I wanna see that $24K house.
I live in an area of the country where Chinese influence is strong, so prices that end in 888 are chosen because they are "lucky."