Yes, the Leicavit is an item still chased by collectors : its value is significant (I second Erik's evaluation). The other are relatively common items: the RASUK (RASAL, ROSOL RAMET ...? don't remember...) folding sport viewfinder (first pic) is interesting, and not to be thrown away...it's the most "complete" version, with folding additional mask, parralax adjustment... a fine item that could bring around 100-120 Euros , the same about for the near focus accessory (item I) probably a NOOKY, that is common but always fine. The external self timer + case (APDOO+APOOM) is too a common item... let'say.. 50-60 Euros if good; hoods and filters have low evaluations, expecially if you want to SELL (for my collectors' experience, thes kind of common accessories have to be used as "partial trade-ins" when you are discussing a buy with a dealer...
)
The item K is uncommon, I think : seems to me it's a booster cell for some old type of Leicameter (lightmeter)... I remember that such an accessory did exist... fine that it's complete with case, pity there isn't the meter it would attach to.