The link in the OP is a referral link.
This is a non referral direct link.
www.amazon.in/dp/B00VBH9G8S/
1. I don't think there is anything to be concerned about here.I have two queries:
1) The serial number of my Mac has an extra 'S' at the beginning of the invoice (so technically it doesn't match the serial no displayed in Apple > About screen), should I be concerned about this? (I know that invoice is not required to claim warranty, but still I am thinking that it might be better to get it rectified)
2) I want to sell my Macbook Retina late 2012 - 256GB / 8GB Ram w/6.5 months warranty left in dent-free and scratchless condition with 180 battery cycles. How much do you think I can get for this?
You should get around 40-45k for it I guess.