QUOTE (BRodda @ Oct 20 2010, 01:45 PM)

Uhmmm... have you ever had to build something? The cost of the materials and the technology required to do so is dynamically inverse to its size. It's called Rock's Law and it is the corollary law to Moore's Law.
However if you wanted to create a baseline on Body 3 being "Standard" and then scale the prices up and down based on size from that I would have no problems.
Well, I more or less think that if you have mass produced drones in 2070 there should be plenty of mass produced parts of rather common modifications depending on industry requirements.
Factory production would have two things that makes up the production cost.
Fixed CostsThese costs are Rents, Employees, Mortgages, Machinery etc. Fixed costs are not affected by volume.
Escalating CostsThis would mainly be Materials, Delivery Costs, Electric bills etc.
The fixed costs gives us a Base Price and the Escalating costs are the ones that would make the cost of items rise depending on need. Escalating costs are affected by volume.
If two arms have a fixed cost of 500 but one of them require 200 in escalating costs and the other 10 then you would have a different Sales price depending on size of the parts.
We also have to factor in mass production which gives Fixed Price/Volume= Fixed Item Cost
Fixed Item Cost + Escalating Cost= Product Base Price
After this the producer adds his profit margin at perhaps 25-50% ...or more.
In the end a small product will take less shelf space and allows for easier storage which is good for a store, and the packaging will be cheaper so the cost for mass produced small components will be cheaper.