With the reservation I am not a Ithaca man.
Only one I own is a NID 10 G Grade 1. It's a real nice gun. Friend that knows more about them than I do says NIDs are the best Ithaca's. Newer NID is likely to have modern dim's too. Nice 20 from one of the 5 premier American makers is well worth the money you mentioned if the barrells are sound. Leaves some room for refurbishment - repair if needed.
Prefer double triggers but would not reject a Miller trigger gun.
Boats
Thanks for the comments. I hung the barrels from my finger and tapped both sides with the other hand. They rung like a church bell.
I will take and post pics as soon as I learn how.
I probably will buy the gun. May become my retirement small game shotgun.