I'm fairly new to seriously collecting the German States, and would appreciate some help with identification.

Upper left: 1862 #55. bister
Bottom left: 1859 # 49. rose
Upper right: 1859 #50. yellow
bottom right: 1852 # 45 Blk on rose
My concerns are mainly with those on the right. The CV with the top one is $600. On the bottom, CV for a used stamp is $1,325. I didn't pay anywhere near that. It is printed on rose paper, but looking at the back, it is white.
I know some of these were reprinted, but the reprints are marked on the back, and these aren't.
Thanks in advance.
Don