Just a simple question, how much do the servo cost? The ones that come with the kit every year…
Come to think of it, I am wondering about the price for each of the other motors… Maybe there’s a price list I can look at? Anyone have any clue?
In Brazil, the drill motors with the reduction box costs about US$ 50 a piece. Not sure about the others motors, since we found some similar in a junkyard, for prototyping… 
The servos are just standard R/C hobby servos wich are around 15 bucks. I dont know about the other motors except from a surplus store you can get the window and car seat motors for cheap, also look at your local junkyard they have alot of stuff for real cheap.
Andrew