Mark the calenders for a very, very big stoop sale in Greenwood Heights. It’s the 3rd Annual 23rd St. Mega Stoop Sale (23rd St. between 6th & 7th Avenues). It will take place on Saturday, May 17 from 11AM-5PM. Per an email: “Houses will have lots of stuff for sale, at, of course, very reasonable prices! (or you can just haggle with everyone). ON SALE: Housewares, Tchotchkes, Books/CDs, Clothing, Furniture, Food and a wee bit of “junk” too!” The rain date is Sunday, May 18.