I paid $4.75 for one.
I didn't really notice the caramelized onion in the egg patty but it was thick and fluffy, as far as egg patties go.
Nutritional Info - Starbucks Spicy Chorizo, Monterey Jack & Egg Breakfast Sandwich (172g)
Calories - 500 (from Fat - 270)
Fat - 30g (Saturated Fat - 9g)
Sodium - 860mg
Carbs - 35g (Sugar - 3g)
Protein - 26g