Complete sets of trampoline springs often cost around sixty or seventy dollars
, but they could be more or less depending on the quality and the retailer that you purchase them from. It's a good idea to avoid replacing an entire set at once by keeping some spare trampoline springs on hand so that you can replace them as needed. It's also helpful if you purchase a trampoline cover so that your springs will be out of the sun, rain, wind, and dirt, when it's not in use. If you notice a damaged spring, make sure you don't let anyone on the structure until it's properly repaired.