Dronacharya's Dilemma

" An excellent proposal , a truly generous one i must say , as you are indeed correct you have the item i want and trading it with the lesser valued item i just bought , it's practically me getting free 500 billion dollars , and only a madman would say no to free money. 

Fortunately I'm not a madman , and i can't say no to free money . But unfortunately for you , now that i know that you are willing to pay 5 trillion dollars for this item , how can I let you have it for only a profit of 500 billion .... Tch , I'm not that kind of buisnessman .... ". Rudra said with a cunning smile on his face. 

Hearing this dronacharya felt like vommitting blood as he realized that this situation had been caused by his own carelessness , as he had dug his own grave by giving Rudra the price he was willing to pay for this item.