Well, I did have a talk with the HP support on telephone. He probably had my email opened in front of him. I also had my paper on which I had noted the details in front of me. But, I did not get satisfactory replies from him, and I am still as confused as before.
The mice I am wanting to buy are these:
http://www.hpshopping.in/HP_X500_Wired_Mouse
http://www.amazon.in/HP-Optical-But...1_3?s=computers&ie=UTF8&qid=1458725042&sr=1-3
http://www.hpshopping.in/HP_USB_3_Button_Optical_Mouse
http://www.amazon.in/HP-KY619AA-But...1_5?s=computers&ie=UTF8&qid=1458725042&sr=1-5
I asked which one was better, and what's the difference between the two. He said that both are better, and that there is nothing different between them... just that they are of different series. He said one is USB 3 latest, but when I asked which one, he couldn't reply satisfactorily.
I also asked about the difference in warranty, and he said to buy from HP site to get full warranty.
He also said that if I had to buy from Amazon, there are HP authorized vendors, buying from which I will get the required warranty. But, I don't know how to locate such authorized vendors on Amazon.
So, I am still stuck.
There is also difference in warranty for two mice above on HP site itself. On individual pages, they both show 3 years replacement warranty, but on comparison page, there is only one year limited warranty shown for HP X500, and other comparisons are marked as N/A for that mouse. I forgot to ask about this part of the query.
So, I am thinking of going with HP KY619AA mouse, which I will have to buy from HP itself, if I have to get full warranty of 3 years, because on Amazon, it is 1 year only. Quite sad, because there is huge amount of price difference between the two sites. HP is selling it for ₹429, whereas on Amazon it is ₹299 only. Darn!!
One mouse that I have decided on is Logitech M105:
http://www.amazon.in/Logitech-M105-...1_9?s=computers&ie=UTF8&qid=1458724880&sr=1-9
It's price is good, but unfortunately, since it is priced ₹350 only, it is going to cost me shipping charges.