La Jolla, CA---Southland homes sold at the slowest pace for a January in three years ? and the second-slowest in 15 ? amid record-low new-home sales, tight credit, and a persistent reluctance among would-be buyers. The median sale price dipped slightly from a year ago but fell more than usual from December as investors and others targeting lower-cost properties accounted for a larger share of sales, a real estate information service reported.