Event - Flea Market
Date - Every Sunday (indoors until May 1st, then outside)
Location - Rideau Carleton Raceway - 4837 Albion Road, Ottawa, Ontario
http://www.rcrfleamarket.com/
Rideau Carleton flea market offers a mix of vendors, from antiques to collectibles to new products. They also have "garage sale vendors" where ordinary people bring in their antiques, collections and household items to sell.
Editor's Note: The Flea Market at Rideau Carleton continues to grow and always seems to have a good number of different vendors each week, so you are not always seeing the same stock over again. There are some great antiques and nostalgia pieces to be found, and many vendors are very reasonable with their prices.