spain_1850,
I haven't been able to place all of these, but here's what I've got:
1. I haven't been able to find this one, though I suspect it's from Neuendorf. I'll keep looking.
2-3. Just not enough there to work with on these.
4. I haven't been able to find this specific cancel, but based on the text, it's from Düsseldorf. In the mid 1920s, Düsseldorf held the Grosse Ausstellung (Grand Exhibition) every May. You can see portions of "Grosse Ausstellung" and "Mai 192-". I'll keep looking.
5. Railway cancel from Lippstadt-Neubeckum, Train 263.
6. This is a commemorative cancel from Goldap, used 1936-39. The text reads "Einfalltor zue Rominter Heide" (Gateway to the Romincka Forest). It catalogs in Bochmann as Goldap #1.


7. This is a commemorative cancel from Bad Neuenahr, used 1930-42. The text reads "Jm Postkraftwagen / durchs Rheinland" (In post cars / through the Rhineland). It catalogs in Bochmann as Bad Neuenahr #1.


8. This is a plain old Heidelberg 5 cancel. Used in the 1910s-1920s.
