You could sell or swap items through a second hand store, an online auction site or work together with your neighbours to host a community garage sale.
Charity shops (sometimes called op shops) accept donations of some items in resellable condition. They sell these items to raise money for their cause. Please check with your local charity store if they currently accepting donations and only take items for donation during the store's opening hours.
Recycler.org.nz lists companies which recycle things like batteries, building materials, metals and more. Fees may apply.