I liked buffet King at Scarborough around 401 and Warden (Tel. (416) 321-6868) I took some friends from Shanghai there, and they liked itvery much. It costs you C$18 on the weekend for dinner and I am sure you will find it worth what you paid.
Super buffet $11.99, all you can eat, snow crab legs, deep fried scallops, shrimp, mussel, fishfinger, BBQ ribs, etc. 75 Baily St ,Ajax, 20 minutes drive from scarborough.