One, I've just read (heard actually, through an Audible Audiobook) Dan Ariely's excellent book - Predictably Irrational http://www.predictablyirrational.com/.
Two, newly sensitized by that book, particularly about Relativity (not the Einstein variety, the common variety), my recent visit to an electronics store (Reliance Digital) was a nice eye opener on what retailers do to convince, confuse & corrupt us into buying what they want us to buy, rather than what we want to buy.
As I walked to the DVD player section of Reliance Digital, I was greeted by shelves full of DVD players from every manufacturer imaginable. The Sony's & Samsung's rubbed shoulders with the Onida's & Mitashi's. I was looking for a particular combination of features and specifically a Phillips DVD player (probably because I have one myself. NOTE: That would be Anchoring in Ariely's book).
The sales person came forward, heard my desired features list - DivX compatible, USB reader capability & HDMI output - and took me to the shelve that had two DVD players.
"This is the Philips DVD
"But this", he said, pointing at the DVD player next to the one he was showing me all this while, "is the Phillips DVD
At this point, he was joined by another sales person. He repeated the glorious features of the second model and I found upon asking, that this 'advanced' model was pricier by a whole 67% when compared to the first model.
Then came the killer blow, the one Dan Ariely warns us against in the book.
The first sales person said - "It's only XXX.XX more than the less advanced model. Go for it. It's the best!"
What is happening here?
According to the book, the cheaper, less functional DVD player is a decoy. It's there to make the feature rich & more expensive DVD player look better as well as create a price point in your mind, what Ariely calls Arbitrary Coherance.
If the less functional DVD player is 5000 rupees for e.g. you would expect naturally that with the 'advanced glossy finish & the FREE HDMI cable' the more functional DVD player would be some what pricier.
The other thing that happens is that you compare the prices with each other, not individually. So, rather than think that you are about to spend 7000 rupees on a DVD player, you think you are going to spend "just 2000 rupees more than the less attractive mode". This allows you to rationalize the decision to pick the more expensive item.
So next time you are out shopping, consider how the items have been laid out before you. Try & pick the decoys and avoid buying something just because it has been placed next to a somewhat inferior version of itself and has smooth talking salesmen/saleswomen showing you just how little more you'd end up spending to get a 'superior' version!
Happy Shopping! :-)