If you sell stuff at a loss on ebay (for less than the cost price) can you get a GST refund?

I have a video camera for which I had paid 900 dollars a couple of months ago. GST and PST account for a 100 dollars of that amount. I want to sell the video camera on ebay , I think I will get only about 400 dollars. Can I get a refund of the GST and PST paid on the excess amount? (900 - 400 = 500 dollars , 15% of 500 is 75 dollars)