Probably worth at least 30-40 bucks a box even as shooting ammo. Not the easiest ammo to get.
Remington is relatively easy to get I paid $36 a box but others have paid up to $45 for it different places! So it's worth $$35-$40 as Wbaad said!
You said not the easiest ammo to get, and although not every place has it, it is available, that's what I was talking to fill your boots on asking whatever but it does matter and yes someone wanting an old Dominion/cil box of .38 may bite, worth a try, start at $60!Doesn't matter if Remington is relatively easy to get, has no bearing on this Ammo that has possible collector value, and wbaad said atleast 35-40 as shooter ammo. But it might not just be shooter ammo to someone who collects it. To the OP, I would start at 50$ and see if someone wants to buy it, if not lower it from there.