There is a little story... i told a guy that i bought a mouse for 5000 and he abruptly said ohh you are stupid somebody ripped you. and moreover he told me that i can find a mouse for rs 150 or 200 from the market. how can you explain to a guy who has never jumped into this league.
and now @Farhansa to your question
The special thing is the feel, precision, quality, sensitivity, dpi, customization, on board memory to save your profiles for 5 specific games in your mouse, laser mouse, 1000 ultrapolling/ 1ms response time, Ambidextrous design, Nine independently programmable Hyperesponse buttons, Variable true dpi setting adjustments in increments of 125dpi, Ultra-large non-slip button, 16-bit ultra-wide data path etc etc
now if somebody only use pakwheels and facebook and hotmail, this thing is not for him. Honestly it is useless for him to spend this much money on this thing. even though i am selling it i wont recommend it to such person. :).
