please guys, remove my doubts

My house is for sale, and I want it to sell soon, and I have a friend who does not even know the subject "lucid dream" right and he told me that I can affect reality with lucid dreaming.

How so? This confused my head, I know that's only a dream ..

He told me to go into a lucid dream, and then modify the dream,and imagine myself in the body of someone wanting to buy the house and self affirming "I want this house"
he said that it works.

But for me this is pure fantasy, my friend would be a little crazy?

I don't think you'll find many people who agree with that. What some people do believe in is that you can share dreams with people, but that's hardly the same as "taking" someone's body and "manipulating" them. While I can't claim to know everything about our huuuge universe, I'm taking a stand here and saying that what your friend said is pretty much impossible. :)

Thanks for answering Lucas, I think this is impossible too, too much fantasy, like hollywood movies..

I totally agree! Of course I can't proof it to be wrong, but to me it sounds extremly unlikely. Don't worry about it :) I'm sure you will find someone buying your house soon.

OK, so realistically, you're dreams are a product of your subconscious, meaning that everything that you see and feel in a dream, except for your own consciousness, technically doesn't exist. There is some evidence that everyone's minds are somewhat linked, but this has only been shown at close range, and only really links thoughts that are available for the other person. The whole total Inception "make them think something by showing it to them while they are dreaming" is completely inaccurate and not likely to ever occur in reality, dreams are really only been "linked" between friends or close relatives who are close, as their minds are more directly "linked".