What is the most expensive beer you ever bought off the shelf?

My boss told me to get something good as we walked into the liquor store. He knew I was the type to always go for "hobo beer". The cheap high alcohol favorites of homeless people..... Well I grabbed some stuff that was called, " Boom Sauce" I didn't realize it when I grabbed it, but a four pack was over 14 bucks! It was delicious, but ridiculous! So.......... he took it out of my pay.