i'm building a low volume product. if you add the cost unfortunately you will see it's impossible to do something of good quality and low volume with much lower price.

you don't only add the sum of the electronic parts, but materials, r&d, payment for the one who does the assembly, marketing, taxes & accounting, shipping package, refunds and defects, payment for someone to produce it or the usage of your existing equipment, etc. if you add all of these, you will see that it's not cheap.