What's the best way to list a print series, individually & as a collection?

[lomas.naturescape]

I'd like to offer buyers a choice of 12 x images of a baby koala as ǐndividual prints, with discount for multiple prints, and as a full series collection. If I include all 12 images in a single listing, variations in size, format, print media & price results in 144 items & confusion. Is there a way of 'grouping' all images to satisfy all options, or to simplify, create a listing for each & explain the multiple/collection options in description? ... appreciative newcomer.