For me, I prefer resin over metal, with small parts in metal for strength. The crispness of a resin casting is certainly a plus factor, together with the ease of assembly, makes it a win, win for me!!
As far as the costing of pieces are concerned it is always a difficult subject to approach. Because there are so many variable factors involved. Sculpting, painting,moulds, casting (resin or metal) packaging, photographs. All are taken into account when costing, or they should be!
But because of the economic landscape, materials are increasing in price constantly.
Casting alloys have increased a huge amount in the last 5 years, from £8 per kg to £20+ in some cases, dependent on alloy and volumes. This will impact on the prices of figures, as you would expect. But it's not a simple equation. You need to take into account the mould life, numbers per spin where metal are concerned etc.
Where resin is concerned it's a different process, so the equation is different, RTV mould life, cure time and waste, i.e casting sprues etc.
In my experience I haven't ever heard a collector say they won't buy my products because they are resin, but I have heard collectors say they won't buy a piece because it's exclusively metal!
But if I'm honest, I think it's all about the quality of the product thats available these
days!
So thats a small insight into the costs of manufactureing figures.
Carl