The Elan, the 32-unit development at 255 1st Street at 4th Avenue in Park Slope, has had a tough slog since debuting last May. With only five units in contract according to StreetEasy, it’s no great surprise that there was a round of price cuts at the end of last week: Most units were reduced by between 5 and 10 percent. Maybe they would have had more luck if they’d stuck with the original (mis)name of The Gowanus. Currently Corco, Warren Lewis and A.D. Shaye have the listings. GMAP