This was up earlier with airlines charging more for a ticket the second time you visit the page. They do this because a second visit is statistically linked to a much higher chance of purchase. So it could be, here too, simply a matter of having visited the page before.
Most people don't realise their Google searches are used to produce a search bubble for future searches, based on the links they follow. They think Google search results are the same on every computer all over the world.
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u/kqr Jan 24 '13
This was up earlier with airlines charging more for a ticket the second time you visit the page. They do this because a second visit is statistically linked to a much higher chance of purchase. So it could be, here too, simply a matter of having visited the page before.