In the UK a few decades ago, if you found a radiosonde from a weather balloon, it would have instructions on how to claim a recovery fee if you returned it for reuse. Sadly I never found one, but I knew this because my dad was a geophysicist and we lived at the time on a Scottish island which was one of the UK's launch spots. Looks like the recovery fee was stopped a long time ago, when the devices became cheap enough to be effectively disposable.