Are these german items rare ????? (10 points )?

Most of the stuff you mention isn't nazi memorabilia, the k98 bayonet is worth something. genuine your looking at 90-100 dollars, reproduction 45-50. Lay everything out on a cloth, blue white or green and take pics. Genuine nazi memorabilia fetches a higher price. You need a collector to see what you have, theres plenty of sites where you can send the pics in and they'll pick out a particular item and ask for more close up pics.