FYI, it is not just hardware or otherwise direct costs.
When you are running a business you want to be sustainable,you need to cover all costs (not just hardware).
A business plan should go over what's needed to break even.
Since anyone can compete on price, and competing on price is pit fighting (someone will always be lower), is that what you want to do?
If yes, then the prices listed in the first post are far too high.
If you are competing on value, then those prices are far too low.
In either case, if you've not looked at the total cost to do business, then it's mute.