I have a 1897 carbine that I got 64 yrs ago as Birthday present
from my old man. He paid $8 for it, hope this helps- LOL
Seriously it looks to me your 1897 is in $1000-$1500 class. I
wouldn't take the tang sight off, the kind of person who will be
interested will be happy to pay extra for sights. It's been a year
since I had one for sale and it was ruff I got $600 for it fairly
quickly at show.

I shot the **** out of the 97 when I was a kid. I had a broken
main spring about 1958. My OM ordered a new one and new
ejector while he was at it. I still have the ejector it never needed
replaced. I got into teens and started wheeling & dealing guns
and the pressure was taken off the old 97.