I know the feeling: from time to time we get  an irresistible urge to buy a new toy, a "something".  Usually it ends with a piece of junk we do not understand what possessed us to even look at. And the only justification we have is that it cost us less than  a hamburger:-)  Been there, done that.  
 
Might be an interesting topic to research for some psychologist-cum- economist. The entire TV Buying Channel  is built on this principle.
		 
		
		
		
		
		
		
		
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