The eagle has been repaired, but it's missing the trigger guards. However, eagles are readily available as spare parts, as there were many Prussian infantry regiments. The pair of cockades is also missing. Therefore, you'll need to add at least €200 to complete it properly.
The helmet liner is complete, but appears to have been greased. In France, a beginner could spend a maximum of €200, or it could indeed be used as a base for a helmet cover. Above, it should be left where it is.