No.1 is a Bf110G-2, 'White 2' of 1./ZG26, if they are all from the same source.
Nos.2 & 3 are different aircraft. No. 3 is Schenck's at Sechtschinskaja (sp) in September 1941, ergo SKG210. No.2 is later, mid-war years, with a heavier calibre rear gun.
No.4 is June 1942, Schenck's 200th mission. Left on the wingroot is a ground mechanic; right is Jupp Kehren, Schecnk's Bordfunker. ZG1.
No.5 is nice air-to-air shot of a Bf110G-2. ZG1.
No.6 is the completion of a milestone mission for Brennike. ZG1.
No.7 is the completion of a milestone mission for Peter Jenne (says so in the auction), ZG1.
He get's his SKG210 & his ZG1 confused, probably due to not knowing the correct dates of the photos. He does appear to have tapped into a 'Wespen' source of photos, however...