James Holmes -- Booby-Trapped Apartment On the Market

For rent: 650 square ft. apartment, 1 bedroom, 1 bath, completely renovated and furnished.

Price: $850 a month

Previous owner: Accused mass murderer James Holmes.

There's history to the unit ... it's the apartment Aurora shooter James Holmes rigged with booby traps before killing a theater full of people last year.

You'll recall ... Holmes littered the apartment with 30 grenades, 10 gallons of gasoline and various booby traps ... hoping cops would blow themselves up when they went inside.

The online listing doesn't mention Holmes. It does say, "We also pay heat, which makes this a steal at $850."

A rep for the building says it's under new ownership.