You bought a collection of used Krag parts. Here's what I see as still somewhat collectable...
A well used butt plate with no finish
A well used rear band with no finish
Front and rear sling swivels
Trigger guard
Screws for all the above parts
A complete bolt
Complete receiver
Complete Trigger and sear
Gate
Follower
Spring
Side plate
Screw

The original rifle barrel has been shortened, so no unaltered military sight can ever be used with any accuracy for distance. The old screw holes have been filled and ground flush.
You can shoot the rifle as is for fun or sport and get your money's worth out of it.
Unless you're very knowledgeable about Krags and are very lucky to come upon a Sleeper at a garage sale or from an unwary seller walking into a show, you can just about always follow the old rule that say's "you get what you pay for".