Local tips usually (always?) have a skip for metal items that don't go out with normal recycling. I just put such items (bandsaw blades etc) in a suitable bin then put them in the skip.
By the time I've got enough to be worth taking down, I've usually also got a collection of batteries, paint tins, wood, MDF, old tech items etc, so it's not a wasted journey for me. Having said that, the tip is only about 5 minutes away and I've got room to safely store all this junk until the allotted day.
..... and no children to hurt themselves on said junk!