To quote myself from another post:
"the thing about Technics is that 1) they sound better than other direct drive DJ turntables, 2) they're better built than other DJ turntables, 3) they have tons better 2nd hand value than other DJ turntables and 4) whenever you play in a club, you're bound to find two, three or four Technics SL1200 or SL1210 in the booth.
So that's why we're all pimping them. It's like the difference between an new upscale Audi and a standard equipped, 5-year-old BMW. The first one is nice, nifty, has lots of features but hasn't got the basics down. The other one gives you no fancy gimmicks, and really is nothing rather special, but it's tried, tested and trusty and gives you exactly what you need, want and depend on."
The Gemini PDT-6000 is around $300-330. Buy a pair of those, and then when you realise how crap they are and you want to sell them, expect to get $300 for the pair if you can sell them at all. That's 300 greenies down the drain.
If you save up right away and skimp on a mixer, you'll be much happier. Mixers have bad second hand value anyway, no matter the brand (save for Urei), and if you're just starting out you'll just want the bare essentials anyway.
Get the cheapest Vestax mixer for around 100 bucks and a pair of 1200s and I can guarantee that you won't regret it.
Go to your nearest dealer and try out a 1200 back to back with a Gemini and you'll FEEL the difference, the 1200 is so solid and rugged it'll last you 25 years. The Gemini, if you're lucky, will last 5 years and after those 5 years their value will be down to less than 100 bucks per table. The 1200s, in good shape, will still be worth 75% of what you paid for them new.