you can buy the whole kit for like 200 and some change. i think it comes with blue, green, purple, and 2 pairs mini bands. at least it did when i bought it.
the deadlift platform they sell sucks... if you can save money and not get it, i wouldnt bother.
i think the bands add a whole new dimension to training. you can use bands on everything.
BUT, if you want to start small, get the mini bands. you can add these to almost every exercise and get a new feel from it.
/irish