Why do Prosthetics Cost an Arm and a Leg?
From: Medical Design Technology - 08/03/2017

Prosthetic devices are known to be costly, but it's important for high
quality components to be used so that the device may function properly.  We
reached out to a few experts to find out if there’s a way to create quality
devices while keeping the cost low.

Read the entire article at:
http://digital.mdtmag.com/medicaldesigntechnology/july_august_2017?pg=20#pg20

Unfortunately this link does not provide the entire article:
https://www.mdtmag.com/digital-editions/2017/08/roundtable-why-do-prosthetics-cost-arm-and-leg-and-what-can-we-do-about-it

Why are prosthetic legs so expensive?
https://www.quora.com/Why-are-prosthetic-legs-so-expensive

The Cost of a New Limb Can Add up Over a Lifetime
https://www.hss.edu/newsroom_prosthetic-leg-cost-over-lifetime.asp

Comparing: $50 3D printed hand vs. $42,000 prosthetic limb
http://www.3ders.org/articles/20140421-comparing-50-dollar-3d-printed-hand-vs-42000-dollar-prosthetic-limb.html