I'd exercise caution - OK, this next bit might sound a little like type-casting, or stereotyping (which is like Mono-typing but quicker

).
Direct Drive decks plus a little, entry level 2 channel mixer, instantly makes me think of scratchers/turntablists. As such the gear may not have been treated to only "fair" wear & tear.
If you get the chance to see the gear first, some tell tale signs of heavy scratch-use would be worn off panel printing around the crossfader, up-faders and Input selector switches (AKA: Transform switches). Also you may even see that some of the plastic fader caps are not all straight and level when you get down "eye-level" with the mixer. On some cheaper decks, also watch the platters going around - watch for any lop-sided, un-even movement - listen (with all volume down) for any rubbing/friction noises from the platters as they spin.
Of course, other tell-tale signs would be if the decks are pictured/set-up in "Battle

mode", where the turntables are rotated 90degrees around, so that the tone-arms are along the back of the units, rather than on the right-hand side.
A couple of LP's entitled "101 scratch sounds that you've heard a million-and-one-times-before" would also be a bit of a hint.

If you're really still looking for vinyl turntables in this day-and-age, then I'd suggest going for brand-new - its safer. However, having said that, there are two "end dates" being mentioned for vinyl, after which no new vinyl will be made. One states this will happen in 2009 due to environmental reasons (use of the raw material stablizer additives used in vinyl/LP production), and the other says 2010, purely on supply'n'(lack of)demand reasons.