Samosa King is possibly the best place for retrieving food for potluck. You can easily feed an army for $10 worth of samosa ($1 for 5 vegetable samosa filled with potato, onion, pea, coriander, lentil and spices). My friends who had moved away from Scarborough had often complained about being lost for potluck without Samosa King in their life.
Thali starts at $4.49, slightly on the "salt-licking" side. Masla Dosa is $3.99 - very economical compared to Saravanaa Bhavan nearby. Quality is on par.
Definitely a great option if you are on a budget or when you have to feed an army!