Welcome aboard. Nice to have you here.
Taurus 689s and 669s are fine examples of revolvers.
I would ask you to please use these:If the checklists are followed in what to look for prior to buying one cannot get into trouble.
Revolver Checkout Procedure
Buying a Used Handgun
Buying A Handgun
Shopping for and Inspecting Used Revolvers | The Shooter's Log if and when you make your purchase.
I use to own a 689 in stainless steel. It had a 6 inch barrel and one of the lightest , smooth, and user friendly trigger pulls of any revolver I have ever owned.
That puppy I traded for another Taurus revolver with a shorter barrel due to going to a defensive gun battery system. I do miss the 689.