The watch glossary has a new guide: Watch Condition Grades: BNIB vs LNIB vs Mint. It puts the condition words from listings in order, from Fresh, BNIB and NOS through LNIB, Mint and Excellent to Honest and Beater, each in the glossary's own words, and explains where BNIB, LNIB and Mint differ.
It also covers the rule that trips up new sellers: a watch sold by anyone other than the brand's authorized dealer is legally preowned, so the Moda watch groups decline words like unworn. Write preowned and let the year, box and papers and the grade carry the condition, and run the post through the Post Checker before you list.