@Michel
why do you repost this list which is obviously containing errors, even if you take the guidelines for comparisons Mr. Tjaoz (aka Rat) is giving in its own postings ?
My summary quoted by Ikir reliably gives price relationships between USB controllers listed there.
As I wrote in the thread quoted by you, prices of these controllers in Germany (with 16% VAT included) are:
USB 2.0 controller:
Spider II (5 ports) + Drivers + Poseidon ~= EUR70
USB 1.1 controllers:
Pegasos on-board USB controller (4 ports) + Driver + Poseidon ~= EUR

Algor (3 ports) + Driver +Poseidon ~= EUR115
Highway (4 ports) + Driver + Poseidon ~= EUR100
Subway (4 ports) + Driver + Poseidon ~= EUR85
Thylacine (1 port) + Drivers + Poseidon ~= EUR75 (or EUR95, I'm not sure if Poseidon is included)
Nothing in the summary is changed except for currency, from $ to EUR.
NONE of price relationships between the controllers were changed.
I tried to explain why here, but it seems easier for people to repost things without ever checking with their own brains if they are true or not.
Your problem is that persons like Ikar use their own brains and do not have to resort to yours.
(Did you recognize that Mr. Tjaoz (aka Rat) is denying to answer this thread ? Just beat him with his own arguments, and all there is is silence...)
Seems that I am talking into the void 
I do not refrain from answering. Just on the contrary. I showed your mistakes and where they came in your calculation. You have doubled German VAT for Spider.
Your continued looking for split hairs is simply boring :-(
Instead of making up how to add something to the Spider's price to make it more expensive, just admit your mistake and that's it.
As regards your trick to add part of Mediator price to the price of Spider... being consequent, you should suggest adding part of the price of Zorro equipped computers (corresponding to the price of one Zorro slot) to the price of Zorro2 USB controllers. If somebody has a Zorro busboard by Micronik or Elbox, parts of their prices should be added, and so on...
Such calculation of controller's price is a clear nonsens!
It is obvious that Spider is being bought by those who have PCI slots (or PCI and Zorro slots), while Zorro2 controllers are being bought by those who do not have PCI slots. Logical and natural, isn't it? It does not mean anything how much their computers used to be some time ago.
Just think how expensive USB controllers for Zorro2 would be for those who have only a PC machine. You should include the price of the entire Zorro equipped Amiga computer. :-)
I hope you can see absurdity of your comments to my summary.