Exhumis:  The Butt area and Butt-plate of your carbine stock are "OK".  Your 1896 Carbine stock appears to have been sanded and refinished in the past (hence the faintness of the "P" in a circle mark).  As someone else stated, the 1896 Carbine Stock is the most valuable part of this 'mixture of parts' gun.  There are many collectors looking for a nice 1896 Carbine Stock.  I would estimate the stock with its butt-plate and band-spring to be worth around $500.  Your barrel band is an 1899 carbine band and not the 1896 carbine band that also serves as a sight guard.  The 1899 barrel band has been painted and in its condition is worth about $35.  The rest of your Krag is 'cut-down' 1896 rifle and its value is based on its utility as a 'shooter'.  I would guess your rifle might bring $450 to $600 from someone who wants the parts.  IMHO