Alright, I'll give this one a bit of leeway.
Most of these chapters are dumb, but surely there are some crazy hipster/organic stores show off the gender of the cows/pigs/whatever for some reason.
If I saw ~1/4lb of ground meat priced at $20, I'd just fucking leave as well. Sticker shock/price would take priority over (barely/no) signs of a murderer.
I will actually say this isn't a murderer/there is something deeper about the story. It's just one of those overpriced markets you find from time to time, hence the complete lack of customers (also it being late at night)