If you're seriously interested though, I recommend calling up some gymnastics suppliers and talking to them. Many are willing to come down in price and give you a great deal on shipping. I got a complete package (7x14ft frame, 2-string bed, springs, and pads) for around $500 less then anywhere on the internet, shipping included (which can be up to 300 bucks).
These things aren't cheap, but it will improve your skiing more then anything else. Nothing is better for building air awareness and balance.
i have a rectangle black bed with spring mats n net. its dope. more bouncy than anyother black bed, but still not as much as a white bed. but still pretty good.