Hello,
Currently on ebay are two Rumpler C.IV photos :
https://www.ebay.de/itm/Flieger-Abt-...oAAOSwg6Jfe0aP
Rumpler C.IV C.677*/16 captioned as FA (A) 260
https://www.ebay.de/itm/X5282-Foto-W...EAAOSwu95feYLL
I think this one is a C.IV but no further information from the seller.
Regards,
Clint