As a project rifle - ie, to rebarrel, it is worth 300 - 350 tops, that is only because Z has (correctly) mentioned its rare to find one with detach magazine - if the magazine system is indeed original Sako, which it does look like ; - the floor plate is removed and the mag has the post and spring loaded latch integral which engages with the original floor plate retainer on the trigger guard.... seen this on pics of a mag fitted to a 579 before.
I wouldnt be interested in the scope or the rings.
I wouldnt describe the stock as "high grade", its the standard they used at the time the rifle was built.
If you were to trade it in, I respectfully suggest you would be offered 200 - 300 for it at best.
I would be rebarrelling it myself , (for myself) and im close to you, so no shipping costs.
Think about it - genuine offer by the way.