[No Frills] Broccoli crowns - buy 4 @ $1 each and receive 4000 PCO points = free (YMMV)
No Frills has a posting in-store where you buy 4 specific items (can't remember exactly what they were) and get 4,000 PCO points. You're supposed to buy one of each of the four products, but I bought 4 broccoli crowns (one of the 4 specified items) at $1 each and still got the 4,000 points. Essentially making them free.
This was at the No Frills in Markham - Hwy48/16th.