A staff member at a Wanganui op-shop, who did not want to be named, found a drawing pin inside the finger of a glove and has had knives and nunchucks brought in.
Another op-shop spokesperson said as a safety measure, they tipped out bags in front of people who brought in goods.
At the Koha Shed, the Wanganui organisation that takes in second-hand goods and distributes them to those in need, Sharon Sunnex said the worst thing they came across was dirty clothing and books on odd subjects.
She said nothing dangerous had been presented in the Koha Shed's two years and they did regular checks of their shelves to make sure there was nothing that could be dangerous to customers.