Brand new or demo unit. It might still carry the manufacturer's guarantee. (Diamond)
In excellent condition, with minimal visible signs of use. (Gold)
Glass and functionality 100%. Used and with slight signs of previous use. (Silver)
100% Working condition, over-all good quality. The body might have scuff marks. (Bronze)
Glass and functionality 100%. Acceptable condition but has fair amount of scuff marks and signs of harder work.