I've never done that, no. And I don't think I will. I usually wait for a few months until the price goes down a little. Saves me about 20-25$ every time.
End of 2016 hardware sales:
Wii U: 15 million. PS4: 54 million. One: 30 million. 3DS: 64.8 million. PSVita: 15.2 million.