mint condition, in
In excellent condition, unblemished, perfect, as in This car is in mint condition. This expression alludes to the condition of a freshly minted coin. [c. 1900]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.