Reuben John works for the Paul Simon estate agent, and his job is to sell a beautiful one-double bedroom, top-floor flat with its own private balcony in one of London's most sought-after areas, Muswell Hill. The flat is being offered at the bargain price of £300,000 ($460,000).

London has one of the hottest property markets on the planet right now, and this seems like an incredible deal. It is easily worth £375,000 or more, in any other location.

There is just one problem ...

... But first, here's a look at the flat! It looks incredible, right?

Back room at 23D Cranley gardens. Paul Simon Look at all this space!

Cranley Gardens floorplan Paul Simon Well, this apartment isn't for everyone.

It happens to be where serial killer Dennis Nilsen lured between nine and 12 young, homeless gay men and prostitutes, with the promise of food or alcohol, and murdered them.

A mugshot of Dennis Nilsen. UK Police Nilsen moved into Flat 23D, Cranley Gardens, in North London in October 1981 and was arrested 16 months later when the drains became clogged with bits of rotting corpses. He used to chop up the body parts and flush them down the toilet. This is what it looked like when Nilsen lived there:

Taken by the police in 1983. 1983 Police Photos It has been over 30 years since those gruesome events, but it looks as if people still cannot see past Nilsen's legacy to the incredible real-estate deal that is now on offer in lovely, leafy North London.

The estate agent Paul Simon is upfront about the flat's history. Its website says:

John, the Paul Simon agent for the property, tells Business Insider: "When we initially marketed the property, we were inundated with enquires and booked an average of eight viewings a week. We are now only achieving minimum interest, say one or two enquiries a week."

The Cranley Gardens flat was sold at auction for £250,000 ($384,000) in August 2013 to a developer that, according to a Business Insider source, wanted to renovate the property and make a bumper profit. It believed it was going for nearly £100,000 ($153,673) less than comparable properties in the area at the time.

The owner did a great job. Look at this renovation:

The kitchen at 23D Cranley Gardens. Paul Simon It looks absolutely nothing like the time Nilsen lived there:

The kitchen at 23D Cranley Gardens. 1983 Police photo

The owner, however, has struggled to offload the property since last year.

If the property's history weren't an issue, the property would be going for about £375,000 ($576,680). It would also have a return of 5% for buy-to-let investors who could rent it out. John said he would happily buy the flat himself if he had the budget and were looking to buy in the area.

It even has an awesome private balcony, which is rare in London flats at this price. One prospective buyer remarked to John that the property had "killer views":

But John said people were offering only "ridiculously low" offers at the moment, though he remains optimistic: "The right buyer will pop their head up, we hope!"

It can't help that even some of John's coworkers will not even go into the property to show people around.

"One of my religious workers said he felt the presence of Jins (ghosts) and refused to do viewings," John told Business Insider.

Crucial question: is the property haunted?

"Being a person of logic and science, I don't think it is," he said. "Saying that, just because you can't see it, doesn't mean it's not there. So I'm sitting on the fence with that one, like any good estate agent."