I don't think that I was panic buying, just hedging my bets, but I did buy a couple of AR platform rifles with the thought that if Hillary won, the Clinton ban would be reinstated pretty quickly.
This is what I did. I bought a semi-auto 'black rifle' with the intention to sell for a major profit, *if the market allowed.* Though, I still wanted to keep the rifle if prices did not spike, so I quickly found that the first rifle I bought was a no-go for me, and turned it into one that I liked - a Beretta ARX-100.
Best firearm purchasing decision I ever made.
I personally disagree that a Clinton victory would have led quickly to another AWB, but I guess we now have at least four years to not worry about it. The bigger headache would have been SCOTUS picks, and those would have hurt us for decades. At least with Big Orange it's going to be a tossup who he picks... With her it would have been nails in the coffin.
Back to the topic, I actually put a decent amount into celebrating HRC's defeat - more than I ever would have spent in panic buys. I picked up a Trijicon MRO, and a Remington 870 a few days after the election, and an East German Makarov in December. All three were used, and they and the Beretta are all currently in the top bracket of my 'favorite toys' list.