Re: Marked up
Agreed, cost for qty. 1 with all the paperwork is always going to be ridiculously high, because it includes cost of design, tooling, multiple forms/certifications/signatures/testing, etc.
Per-unit cost decreases drastically once you manufacturer in volume, so if $contractor builds 1000 of these toilet seats perhaps their cost comes down to $100/ea (and if it's FAA or other TLA certified, that may be a bargain... I have an FAA-certified noise canceling headset for which I paid around $1300, even though it's likely not that much better than consumer stuff costing $300).