Emma,
Absolutely,
Just one that springs to mind - I had a client who was a lovely chinese man. He wanted to everything about the product so I gave him all of the details. He wanted to go away to get his wifes approval. I established an appointment with him the following morning to talk about the dollars, he requested straight up for a discount of $10000 on a $26988 product. Clearly there is not that much room to move - So i told him that I might be able to help out with hundreds not thousands - He then said minimum $9500 - I closed my book and shook his hand and politely told him that we should end it there as he might not have enough money to go through with the purchase - He then said fine gruffly - I walked away - He then called me back when I was about 10 meters away and signed up at $26988.
It worked for me.