Don't buy it - RENT IT
As much as I like this movie (it brings back so many nostalgic feelings for me) it's a hokie movie at best but back in the day it was the SheeyIt! I LOVED THIS MOVIE WHEN I WAS A KID. However, your kids won't like it cuz its not hi-tech, you'll watch it maybe one time and then maybe never see it again so its not worth the going price of $30, $40, $80 or whatever. NETFLIX as it turns out has it and you're better off renting it. I bought mine and I really kinda wish I hadn't because I know I'll watch it one more time and that'll be it. I guess i'm off to ebay then.
:)
I may be wrong in my personal opinions but I'm still entitled to them.