跟她講you believe you were deceived and that she acted in bad faith

Then, threaten to file written complaints with her agency, the state real estate commission and the local board of realtors.

上邊的是網上抄來的，試試看，不要輕易付全款。可以找當地律師谘詢下，發個律師信過去最好。沒準她攢了不少complaints,就算了呢。也沒準你們因此可以商量個低的價格。最差無非是你多付一些律師費