Order by price, with a sort by column (not per line)

Question

I would like to rank the prices in ascending order, but the sorting is not done by line, but by column. One product per line, and each seller represents a column.

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| title    | price_amazon  | price_bestbuy | price_seller3 | ...
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| iPhone   |       699     |      899       |     759      |...
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max : 8 sellers

Result :

iPhone :
best price : XXX
2nd price : XXX
...

Thank you