Alton greenhouse disassembly

Hi all,

Could someone tell me if older Alton greenhouses come flat packed into individual lengths of cedar or do they arrive as panels like a garden shed would?  I've seen several older amateur types for sale recently but I've been put off with the lack of information regarding their disasembly.  I've seen a picture of the side and roof sections taken apart but the same picture shows the gable ends intact.  I'd be grateful for advice.