I bought this new and have used it only once in my studio.  It's in brand new, perfect condition.

The Pioneer DDJ-T1 controller is the perfect integration of Traktor DJ software (not included) and Pioneer operability. The DDJ-T1 offers the same operability and layout as Pioneer's pro-DJ equipment, while enabling DJs to play music files from the computer via dedicated Traktor DDJ-T1 edition software.

The controller is in perfect condition. It has hardly been used at home, and has been taken out to one gig only. It sells for $700 new (that's how much I paid for it), but I'm letting it go for $400. A steal.

The DDJ-T1 easily connects with a user's laptop via USB for quick "plug-and-play" capability. For further convenience, the controller also comes with a computer dock that allows a laptop's keyboard to slip directly under the controller, bringing the monitor closer to the DJ, providing fast visuals of song information while mixing. The device adopts Pioneer's "P-LOCK Fader Cap," designed to prevent the fader caps from slipping.

Key Features Include:

* Plug-and-Play USB Connectivity -- All buttons and knobs have been pre-assigned, so users can quickly connect the controller to their laptops by USB cable and start their performances without having to adjust any complicated settings. Additionally, the DDJ-T1 can be powered through the laptop's USB port.

* Specially Designed User Interface -- The controller layout and TRAKTOR software interface are identical, ensuring ease-of-use and precise control. The DDJ-T1 is modeled after the proven design of the professional Pioneer DJ player and mixer and integrates 115mm jog dials, accurate search functionality to quickly find playback points, a load button for song data and a master synch button for beat matching across four channels.

* Highest-Quality Sound -- The controller is optimized for the TRAKTOR DJ software and incorporates technology from Pioneer's professional line of DJ equipment to ensure the highest quality sound output that DJs have come to expect from Pioneer products.

Additional Features include:
1. Proprietary lock mechanism called the P-LOCK Fader Cap designed to prevent fader caps from slipping.
2. Premiere built-in sound card

For detailed specifications, visit 
pioneerelectronics.com/PUSA/DJ/Controllers/DDJ-T1#overview

Traktor software is not included.