Not much backed by logic? The only logic is how much is in my pocket after a sale. Buying power is all I care about. Is that not logical? If so, then I am not logical.
Here's the way I shop for something. I find out it's name like "widget XY-001" and I search for it on the Internet. I get all kinds of hits and I look at all of the places selling that exact item. If I see prices that are fluctuating, then I start with the very lowest price I can find and see if the seller is one I want to use. Many times I get lucky and find that places like Amazon, or other well known sites, have what I want for the lowest price. Sometimes it's through places I do not know, but at least I have seen what the "average price" is and I can decide for myself.
When I see an item that is the same price everywhere, I immediately know that the Manufacturer has built in at least a 200% markup on the item, (MAP). 100% markup for the Mfg and 100% markup for the Retailer/seller. That is how I see it and then I find one used on ebay, or I forget the item all together and buy something else.
It is my choice as a consumer to either pay exorbitant MAP prices which make the seller and the mfg rich, or to buy items at the lowest price possible, that are still functional, for what I need. Every consumer should shop around, unless they just don't worry about money, as some people do. That is fine, but for me, I will not buy the high price if I know the mfg and seller are raking in 100% markup off the item. 100% markup is more like 150% reality, so an item made for $1, then sells for $2.50 wholesale, to the seller and $5.00 to the consumer. That is how MAP and Markup work.
Believe me, even places like Wal-Mart sell lots of things at 100% to 200% markup, while they also sell other things "loss leader" at 10% markup, just to get customers in the store. We, the customer, hardly ever get to purchase at less than 100% markup, because we never truthfully know how much it cost to produce. No one wants us to know that.
Any manufacturer that says "it costs X amount to make", go ahead and divide that number by 3 or more, since the real value is most likely 33% or less than the value they quoted. It is the way it is. No Mfg in their right mind would tell a consumer how much something really cost to make, or even a dealer, since the dealer "wholesale price" is still at least 50% markup.
How do I know? I've been in sales during my life and in manufacturing most of my life. Been through enough budget meetings and sales and marketing meetings, to know how much things cost and how much profit there was, or how much it needed to sell for, before X amount of profit would be made and at what volumes the pricing could be changed.