Located in the south building of the St. Lawrence Market, Uppercut Meat Packers is one of the more reasonably priced butchers. Every few weeks when I need to restock my freezer I head to Uppercut Meats to grab the staples like lean ground meat (if you buy 3lbs of lean ground beef they give you a deal!) pork chops, pork tenderloin, chicken. While they don't necessarily have sales like the big supermarkets do, I can always depend on the quality of meat I am getting from this butcher. Their chicken breasts are very large, and I made the mistake of buying 4 when realistically I only needed two. They will package separately if you ask, so consider that when ordering.
Another thing I really like about this place is they vacuum seal their meat if you want. They generally will ask if you want it vacuum sealed, but if they don't ask right away and have already packed it for you they will still vacuum seal it if you ask.
This place always has an abundance of friendly staff working there and they are very quick to serve you. They are open from Tuesday through Saturday and only closed on Sunday as Monday as per St. Lawrence Market schedule.
If you're looking for good quality meats from a butcher you can trust then I recommend checking this place out next time you're at the market.