Why is the product you want not $100?
Because companies that could have them need higher volume beyond what you think,
Companies that would service customers here, would need to make money.
(That $15 Pasta dish at dinner costs around $.86 to make)
After sales and before sales, service, emails, and support in this hobby are very time consuming,
along with employee costs, insurance, overhead, etc.
Your estimate is real, only with large numbers, and no service.....
IMHO.