Contracting someone to make 3D models for printing: suggestions?

[EcholocateChoco]

@SamSam

I see that Shapeways accepts designs in STL, OBJ, X3D, DAE, Collada or VRML97/2 (WRL). I know nothing about the different formats. Is this list pretty standard, so if I decide that another site offers better quality/prices, the file that my artist makes for me in one of those formats should be pretty acceptable to the rest?

Can’t speak to the other questions but those are pretty standard 3D formats, easily created with pretty much any 3D software. Apart from, heh, VRML. That’s a blast from the past.