There's currently a Joker and Harkey Quinn digital comic book sale going on at Amazon on their Kindle store. Lots of Harley Quinn and Joker-focussed collections down in price. Nothing too unusual about that.

But there are six volumes that are so much of a steal, it's criminal. In fact, it looks like a glitch.

So why not buy them while the price is still a few cents each? Or nothing at all?

Here are the volumes you'll be wanting to check out to see if they are glitching in your territory. If they are, run don't walk…

Harley Quinn (2000-2004) Vol. 1: Preludes and Knock-Knock Jokes

Harley Quinn (2000-2004) Vol. 2: Night and Day

Harley Quinn (2000-2004) Vol. 3: Welcome to Metropolis

Suicide Squad (2016-) Vol. 1: The Black Vault

Suicide Squad (2016-) Vol. 6: The Secret History of Task Force X

Harley Quinn (2016-) Vol. 6: Angry Bird

The insanely low prices are not being matched on Amazon UK or on ComiXology US or UK, they all just have the normal sale discount which is why I suspect this is a glitch. In which case, take advantage of it while you still can…