Food to buy at Starbucks:
Spicy Chorizo Sandwich -- while the sausage can have kind of a grainy quality that I don't care for, there aren't a lot of other places that offer chorizo sandwiches
Turkey Bacon + Egg White sandwich -- a healthier breakfast sandwich, tastes pretty good for what it is, and most other fast service places don't really offer a low-fat/low-cal option
Sous Vid Egg Bites (Red Pepper or Bacon Gruyere) -- the sous video cooking makes the eggs really fluffy and tender, and a nice alternative to the stiff egg products you're going to get from other places. An obvious option for low-card people.
Fruit & Cheese Plate -- on the pricey side, but unavailable elsewhere. Plus if you tried to assemble a similar assortment of cheeses for yourself (cheddar, gouda, brie) you would probably end up spending more at the grocery store since those kinds of fancy cheeses aren't sold in single-serving portions.
Peanut Butter Cup Cookie -- basically a peanut butter cookie with chocolate filling. God tier cookie dessert.