If you sell it buy something your father would appreciate.
A Korth, NightHawk, Manurhin MR73, etc.
You know, trade up.
If it has sentimental value and cannot be sold, treat it like the memory deserves.
I never could afford a gun that I couldn’t use so, I cannot encourage you to shoot it or keep it in the condition it was received, never had to make that choice.
If I could afford it I would carry a Korth Mongoose.