I have ar7s which are a really nice durable park ski. I think the retail is about 500 but im sure you could find them on sale somewhere. I have also just bought a pair of liberty 2012 LTE's for 320ish and they are also meant to be a durable flexy park ski they are also really light.
if you mean like a warrenty then it depends, most companies wont warrenty your skis if they were used on rails alot because of how much rails destroy your skis, but if you have the extra money then you might aswell get it just incase they snap or something
we call front swap front 2s ellen d's cause they involve a lot of scissoring haha - .squirrely