Users online have been left fuming with the vendors as four mince pies can be found at Tesco for £2.50.
Some critics have claimed that they can find six of the pastries for £1.99 at their own local stores.
The image shows seven medium-sized pies, with a slightly emaciated pale colour to the pastry.
The mince pies are topped with a Christmas themed design, either an off-centred holly wreath, Christmas tree or star.
A sign in front of the festive treats reads “rich mince pies £5”.
Walter Which shared the shocking prices on Facebook yesterday (MON), writing: “Rich?
“You’d need to be.”
The social media post has received over 250 likes and has been commented on over 75 times from users appalled to see the price of the snack.
Dávid Hollósi said: “Bruh.
“What can those mince pies do?
Matt David Jupp wrote: “I can get 18 from Sainsburys for that price.”
Nicole Phillips commented: “A Fiver.
“That’s steep, maybe it’s something in the icing sugar.”
Steve Saunders replied: “That and a packet of spicy Cheetos.
“You’ll need another mortgage”
This is not the first ridiculously priced product to have been spotted around London in the last few days.
A Leicester Square tube station shop was snapped up selling a 225 grams bag of spicy Cheetos for £6.99.
And outside the capital, Edinburgh’s Christmas Market was found to be selling Lidl mulled wine for a markup of 366% in 2015.