should i buy an isis

[gahhhhhh]

A while ago in 2010 I was really interested in starting the adventure. But in my research I had the basic jist of how to solve the isis 1 Due to spoilers Which really sucks.anyway. now I want to buy an isis puzzle. But i dont want to spend 200+ dollars on something I already know how to solve. So is it worth buying the first isis. I pretty much know about the big bang and a couple moves. So is it more complex then that or should I not buy it?