I've not done a cost analysis, but the fact that it's now something I can eat has to count for something. Also, I have another idea for which we've bought another two tins of Seville oranges. I want to see what happens if you buy the really cheap stuff (27p), boil it up and mix it with a tin of oranges. I figure the cheap marmalade is mostly sugar and pectin...it's an experiment I think is worth trying at least. Erica, from Northwest Edible Life has opened my mind on this.