Second-hand Versus Used
There is no universally agreed definition of used or second-hand in a LEGO context. A set still in a box is not generally considered used. It may be considered second-hand (especially if it shows some shelf wear as it has passed out of a retailers hands into those of a consumer before reaching the current buyer.
- bite marks - scratches or impressions left on elements from teeth when trying to separate elements.
- built once - a given set is opened, put together following the provided instructions and then disassembled for storage and sale.
- heavy playwear - elements used for a long time by children display damage and markings including bite marks (above).
- lightly or gently used - usually this means someone has built and possible played with a given set or element.