If it has no import marks, I know collectors will pay premium for those over an importer marked piece. I don't know for sure how much extra that adds though.
Without seeing the condition of the bore (and assuming it's as nice as the exterior) I don't see a problem with your $800 pricetag.
With no importer marking and with the muzzle extension, it was imported prior to the Gun Control Act of '68. Before the GCA68, the minimum rifle barrel length was 18" and that's why the muzzle extension was added to the imported M94s.
Also, after the GCA68 went into effect importer marks were required.
And like Deadin said, the little carbines are a blast to shoot...literally!
Just like the stumpy little Mosin-Nagant carbines, the fireball is pretty impressive.
As for the fact that you've never fired it...it's a surplus rifle so it's already been fired a few times.
but, if you don't have a use for it and someone else is interested then by all means get that deal working.
My introduction to the Swede was with a friend's M94, which is also a pre-68 import. I've had quite a few M96s and M96/38s but I'm still trying to talk him out of that little M94.