because he needs to maintain a fat margin for his business.
he probably has old stock bought at a lower rate and selling at near MRP to bag a fat profit.
that would also explain his same spec recommendations.
No one in his/her right state of logical mind would buy his config from his shop.
and who the hell includes OS price into the total PC budget??
I say lets report this guy for trying to advertise his own business. if he wants to recommend his business, he needs apply to be an Official Rep of his store.