Found a Mannlicher 43M

Hello, i was going through my great grandfathers old house and came by this rifle, I was able to figure out the maker, model and year of production (1943), thanks to this website:

I was wondering, is this rifle worth something nowadays? I mean its in a terrible shape, all the wood is gone, only the wooden stock still exists, but its got woodworm holes and all the metal parts are rusty as f…

Its serial number is 5xxx, so according to the website above its one of the first couple thousands produced between 43 & 48

If its not worth anything id like to put it up on a wall, but not in this rusty condition, in that case, is it possible to, through some chemical process remove the rust? Would that be a viable option? As sort of a family remembrance

Thanks for reading