Does the property have the right to sell this house?

Then ask your aunt to take out180,000 and transfer it to you, and then you can transfer180,000 to your aunt. Of course, there may be tax, but it is more suitable than you taking 240 thousand. 180,000 can't be bought directly, because you didn't pay the down payment, and you are not the legal heir of your uncle, so you can't enjoy the treatment that heirs should enjoy.