We'd love to see pictures of the Krag you bought. Sounds like you got quite a nice package, even if it isn't all original. Krag 1898 carbines are somewhat rare by themselves. There were only 5002 of them made.

The front sight rifle cover, if that is what you got, sells for around $70 by itself. The carbine front sight cover is more valuable and has a "c" marked on it also.

If you get a chance, please post more pictures.