I have check the prices of dell laptops everywhere(even in Nehru Place,Delhi).
You can't even get the same price that you get on dell website and you are saying that you can get a better deal than this.
Generally what local dealers do is they give you some cheap accessories or may be a backpack or a free antivirus which don't even 500 bucks to then and they sell you at a higher price by just giving this crap, they are very good with dealing the customers,that is what they are doing from years.So please don't believe what they are saying and try to see the reality.
I also buy a laptop every month for some or the other person and this is what I have experienced in last 4-5yrs.
In case of computer system I have a experience of more than 10yrs.