alyssium wrote:In terms of cost per a single cel Evangelion and Ah my goddess (those angels can get expensive!!!)
In terms of most expensive series; Ah my goddess due to sheer volume (there is certainly a deposit for a house amassed in that collection) and Sailor Moon (the popularity of the series drives the prices up!)

Regarding Sailor Moon, you've to focus first on native english collector huge demand. This is what can be called "regionalization", meaning that one local market create this over value.
See in France the cost of Saint Seiya compared to the amount of collector (90% of french collector, but only 4% of global RS demand).
My most expensive is an Harlock OP, only justified by the fact that I seeked it for 10 years, and that the price was not took into account in this purchasing decision.
Mass demand pushes prices up, but is it a reflection of a "local" demand, or the reality of a "global" demand. In such condition people can easily place order in non popular anime countries, and arrange sales in the place where this "local" demand is high.
Those kind of aspect are drastically studied io my coming thesis (4th quarter period 2009). I've already a deal with a Californian translator to turn it into english, may this interest fellow collectors ? (just to plan translation costs)...