Do they even have margaritas in Pittsburgh?

My brother told me that my parents drink margaritas now. Even at home! How is that possible/affordable? A single lime costs about $0.70 at Giant Eagle. For comparison, I can get 6-10 limes for $1 now, depending on where I go. I buy so many limes because they're so cheap that I throw a lot away. It's worth it to have the option for a lime.