I'm eagerly awaiting the delivery, from Germany, of my new Bellicon rebounder. A rebounder is a mini-trampoline and I've been using one for at least 15 years, but I've only ever used the sprung versions and the most I've ever paid for one is about £60 (and that lasted no longer that the £25 versions I'd been buying previously).
The problem with cheaper rebounders is that they're noisy, the bounce can be quite hard and, if you use them seriously (for me, that's a vigourous 45 minutes, 6 or 7 days per week), they only tend to last for a couple of months or so before the springs start snapping.
The Bellicon Swing rebounder is known as 'the Porsche of rebounders' and it uses replaceable bungee bands instead of springs to give a much quieter, smoother and more comfortable bounce that's easier on the back and joints. I've been looking at them, enviously, for years but never felt that I could justify spending a minimum of £310 (that's for the smallest size, without folding legs and ex. VAT and delivery charges). However, I've realised my folly and overcome my innate tightfistedness, and now I can't wait for the delivery van to appear on my driveway!
NASA described rebounding as 'the most efficient and effective form of exercise yet devised by man' and, if it's good enough for NASA, it's good enough for me! It's great fun... I do it first thing in the morning. I just stick on a CD and, no matter how tired I am when I wake up, I can guarantee that, within 2 or 3 CD tracks, I'm feeling good and full of energy.
Check out this article: 42 Ways the Body Responds to Rebounding by Dr Morton Walker and Albert E Carter. And if you're thinking about getting a rebounder yourself... I can highly recommend it! Maybe you could start with the cheaper, sprung version first to see how you get along with it and then, if you become a convert (as so many people do) and find that this is a sustainable form of exercise for you, you could upgrade later. Let me know how you get on! (But remember that the cheaper rebounders can be hard on your joints and spine, so take care! I just found the following video which gives an indication of the bounce quality and noise levels of the different types of rebounder.)