Your Krag is worth $13.75...less if it doesn't come with a bayonet
IMHO: Your Krag has a history all it's own. An original unmolested Rough Rider is like the Holy Grail of Krags. So yours isn't as Holy...but it is a Rough Rider Hybrid!!! How awesome is that! Just think of it...someone in the picture below may have held your rifle, or at least part of it.
Lets make a partial parts list if you were to decide to restore it. Remember, some parts will be hard to find:
Carbine Barrel $200+
1896 Carbine Rear sight $500+
1896 Saddle Ring Carbine Stock (good condition and correct) $450+
1896 Carbine Hand Guard $250+
1896 Carbine Barrel Band $85+
Saddle Bar and Ring $100+
If it were up to me to decide...I would enjoy it as is.