The rest will go to Pakistan. If you aren't advising to buy all 10000-13000 MRAP designated to be divested, then the number that India will not buy will be given to Pakistan in the name of strategic balance and WoT.
Now, we may end up buying 2000-3000 MRAP but the same amount given to Pakistan for free. in the name of WoT support.
In any case if India doesn't buy, still Pakistan will not get more that 2000-3000 as they don't have the money to support them and run them.
so, by buying these MRAP we aren't stopping from USA from giving them to Pakistan for free but, we are giving then one better reason for transfer, which is strategic balance apart from WoT.
So, your first point is lame.
Coming to your second point, I would like to see the life cycle cost to believe how cheap they would be.