Logitech G600

Is there any LED light, underneath the mouse.?
Nope, there is not. At least since it's laser, doesn't emit any light.

How many profile can be saved on mouse.?
How much you like I think but it has 3 modes,

What do you think about the mouse.?
it's a great mouse, for 40€ and free shipping, just a steal :P, it's very comfortable, very good quality, has tons of colors to customize, lots of buttons, you also cannot press them accidentally, with the third button on top you can use it to change the entire buttons to other functions while pressed or use it fo make dps slow when sniping or just put any function you like, any button is customizable

Is the scroll wheel a little imbalanced.?
Nope, it's all good. You can also click it to the right or left.

any spl reason to spend 3000rs on mouse?

I have this mouse.

1. No, no lights on the bottom. Just the thumb keys and the Logitech logo light up
2. Not sure about the profiles.... I haven't used that mouse much... the reason why is below.
3. I don't like the mouse. The thumb button keypad is just a little too big for my thumb and requires a bit of straining to reach the bottom buttons. I also don't like the third (ring finger) button... it's a great idea but poor execution since, with a broad mouse like that, I often use my ring finger to help control the mouse and can't always focus on whether I'm pressing that third button or not. My current MMO mouse is the Razer Naga 2014. The thing about the G600 though that I really like is that the thumb buttons have a few tactile features to them (unlike the Naga) that make it easier to know what button you're pressing without having to stop and think about it sometimes. However I know my opinion doesn't necessarily reflect that of the masses, and your mileage may vary.
4. The scroll wheel is probably the least of the issues I have with this mouse so I would say no, it's not imbalanced.