You have a minor typo in the following sentence:

Now the way I sold rig is quite interesting and I want to share it, First of all i sold on of the card on classified website in loss of around 20$ to an unknown gamer and then I ungraded my rig RAM and HDD, Installed couple of naughty games on it and sold it as gaming PC, In this way I am able to get around 850$ for RIG which is a good dela but again I don't want any of my investor to bear any loss so we will assume the sell price as 880$.