These words refer to things that have not been owned or used before.
Newis the most common word for this.
New cars tend to lose a lot of their value in the first year.
You can also usebrand newto emphasize that something has never been used before.
The dress is brand new - still has the sales tags on it!
If something, especially an object for sale, is in perfect condition as if it were still new, you can say that it isin pristine conditionorin mint condition.
The LPs are in pristine condition and still wrapped in plastic.
That collector has a 1972 Corvette in mint condition.