If in your shoes I think I would post on Nitroexpress.
IMHO this nice M.-Sch. carbine has been refinished; originaly bolt was blued, not polished white. It also has the remains of a previous scope mounting which was German claw (SEM, Suhl). So I would consider it a shooter, not a collectors item, and valued accordingly. I sold a similar one for about $1.5K a couple of years ago, but that was here in central Europe.
With kind regards,
Jani