I don't know how your luck will go but I had this happen twice. First a week ago I had the link for the motor's open in my browser. http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8622
I was doing other work and after about 5 minutes an overlay came on that said. "one time only, put this in your shopping cart for a discount." So I did. HobbyKing was giving a $.50 discount per item. I didn't order at that time but when I ordered today, I popped the window open and left it sit while I did some other things. After a few minutes the popup showed up and I ordered with the same discount. Now, this was prior to my creating an account at hobby king so if you have done that already it may not work.