Repot if age is unknown?

I bought a juniper from a nursery but they had no idea on the age of the tree since it is an outside bonsai guy that supplies them. I called him but he didn't know the age.
Should I repot to be on the safe side? Or if my juniper is in good condition should I hold off? Is there a "tell" of if the tree is in need of reporting? I can post pics if needed.

If water still drains well and it's healthy, repotting is probably not necessary.

Sounds good. I may as well post up a pic too since I still don't know the exact identity of this juniper

Never mind, turns out I have a precumbens nana