It wasn't all that long ago that DJ turntables were the only option. The computer revolution brought, to the masses, the ability to set up in a club or start performing for weddings. That opened up the world of DJ'ing to so many...and now many of them are returning to the roots of the craft.
DJ turntables bring a tactile and pure sensation that can't be duplicated. The music just sounds different when played through DJ turntables. Less effects means more skill is necessary to keep the music hot and engaging. Granted, one could still get most of the newest electronic features in their DJ mixer, but if you've got two DJ turntables and a microphone there's no need to go messing with perfection.
All prices are in USD.