Weasley twins are 50% off
Only one, but they have to turn it on and off 50 times before they're sure it's fixed.
Pants 50% off
Because they have already looted everything they would have bought anyway.
Steer Wars.
Pun-fu fighting
Fetus Deletus
Why was Harry Potter kicked out of Hogwarts? He was caught playing with his broomstick.
The Weasley twins