The serial # AUC should be from 1987 maybe late 1986.
No box but true 99% ?
This would mean the gun is unfired with NO handling marks.
99% guns are few and far between.
There are fine specimens of late 80's
6 inch 25-5s sitting on auction sites
now for $900. to $1000. asking with no bids.
use this as your guide whether buying or selling.
A 4" model 25-5 in true high condition (98%)
will sell for $1000. and up.
It is amazing how much 2 inches of barrel make as to the
desirability of a N frame Smith revolver.
As far as shooting a model 25 in 45 Colt I would rather shoot
a 6 inch.
Longer sight radius and more controllable with the longer barrel length.
Good luck
Allen Frame