You technically already had your wish, but the Evil Genie is feeling generous and will grant your wish... in due time when the Evil Genie gets tired of granting wishes he'll pass the torch over to you. But becareful what you wish for as it more of a curse than a blessing, constantly having to grant other people's wishes all day long.
The problem is that he said he "wanted" that piano, but he didn’t say he wanted it for free. He didn’t even say he wanted to own it. He just said he wanted it. Well the EGG can grant that wish and gdae can “want” that piano all he wants. Wish granted! If he actually wants to own one, I saw a few on sale on eBay for around $70,000.
The EGG has spoken yet again!
Dang, you're good.
I'm stumped now. Must think of another way to trick you.