Flea Market a big draw for repeat vendors, customers Annual event is Saturday at Gateway For each Rossmoor Flea Market, there’s a contingent of savvy sellers who plan ahead in the run-up to the annual spring event. This year’s Flea Market is Saturday, April 29, from 9 a.m. to 2 p.m., utilizing the Fireside Room, Oak Room and Peacock Plaza at Gateway, each filled with vendors selling