Been coming to Rincon de Buenos Aires for ages. Whenever we're in Vegas we make it a point to stop by to grab (cold) empanadas to take home for later. For the take and bake ones you can only get beef, chicken or Spinach, because the ham and cheese and corn empanadas are fried. We always get the beef ones because they are my daughter's favorite. They will give you chimichurri sauce on the side to take home too, and they will even give you ice to keep your empanadas cold while you travel! :) Their chimichurri sauce is awesome, BTW, so don't forget to ask for it. Empanadas heat up well at home in the oven. Paid around $10 for half a dozen. They are very friendly, but be patient because they can get busy, with only a handful of staff members.
P. S. Restroom is off to the side, past the market section.