Buy something that in the worst case scenario you use or sell it for what you paid for it, best case scenario you sell it for a large profit and buy more guns. Sounds like a horrible proposition to me.
Six months ago I sold an AR to someone that happily paid $2000 for it, I went and bought myself an M1 Garand, an M1 Carbine, and a WWII P38 with the money and I had a little bit left over. Sorry, I am not going to apologize for that one. I traded someone a stripped polymer lower and some AR mags for a German K98, don't regret that one either. I made a little chunk of change selling other stuff in the early part of this year, and it all got turned into more guns, ammo and accessories. If I can make some money and greatly further my collection in the process then I have no issues.
If history shows us anything, this will happen again and not necessarily because people are killed. It happened to a lesser extent when Obama was elected. People do not learn, people will panic buy and there will be more panics. I do not see anything wrong with buying a few extra lower receivers, BCGs or magazines if you find a good deal on them.
People flip houses, people flip cars, people flip antiques, people make money on all kinds of things. We just had a huge drop in the stock market recently, did anyone get all butt hurt when some people bought low and are now selling off some in the bull market?
Next time there is a panic don't get mad at people who invested their cash and time into a commodity for the opportunity to make extra money or trade for nicer firearms. There is no reason to get angry, get screwed, or go without when you can turn lemons into lemonade.