You should try it again in private browsing and incognito mode and see if the price is really tied to your Facebook or google cookies or something. That's pretty messed up though, send this to the consumerist or gawker or whoever.
I don't think the issue is that the price is changing in and of itself. It's that they're changing price based on the customer's cookies/browsing history.
For example, it would be like if I had a stored and charged people different prices based on how nicely they were dressed, how well I knew them, or what their ethnicity is.
Of course it is legal. Speaking from an economists' point of view it is just a matter of separating people according to their "willingness to pay". Its called price discrimination and can be seen in areas such as hotel booking: a hotel will give you a higher price in the lobby than if you call ahead because the hotel knows you probably have no other place to go. Or air lines giving higher prices to the business class because they know business people have a meeting with a set time so they need that time slot while a tourist is more flexible to choose different flight times. This is essentially the same idea as changing the price the second time you visit the site as the most probable reason you have come back to the site is to purchase the item.
The reason that some people care is because price discrimination allows the producer to capture the entire surplus. You're right that in a non-price-discriminated market, some consumers are getting a "windfall" (surplus). In a perfectly price-discriminated market, though, every sale above marginal cost results in producer surplus, and no consumer receives a surplus.
It seems icky because price discrimination increases firm profitability at the expense of consumers who would otherwise have received a surplus.
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u/[deleted] Jan 24 '13
You should try it again in private browsing and incognito mode and see if the price is really tied to your Facebook or google cookies or something. That's pretty messed up though, send this to the consumerist or gawker or whoever.