regret gets you broke

Research on inaction inertia has shown that when people forgo a profitable opportunity (buying a $10 shirt for $2), they tend to forgo a subsequent opportunity that is somewhat less profitable (buying the same shirt for $7) because they believe that accepting the second opportunity will cause them to regret having refused the first.

Having experienced the above sentiments and feeling totally lame, these people will begin to avoid the anticipation of regret.
To avoid the anticipation of regret people will tend to overpay for consumer goods, to negotiate ineffectively, and to overvalue the ability to change their minds. Clearly, people pay a steep price to avoid future regrets.

I personally know relatives who fit this category to the dot.
They will go all over town, bargain for every rupee and finally not buy anything.
The next day, they will walk into the nearest store and buy some product for twice the price in contrast to their search the previous day for the product at half the price.

I reckon as long as people can get a good night sleep and keep on chugging being a dolt, research can always be qualified.