Do people buy them? Sure they do. Sales aren't the goal, though. The idea here is to induct people into a lifestyle, because these same people sell things like wilderness survival courses, subscriptions to survival food delivery services, tools and weapons, and vitamins. Prepping is big business, with Yahoo! Finance reporting that as many as 3.7 million Americans identified themselves as "preppers" in 2013, fueling demand for a multi-billion dollar industry.
The communications equipment may include a multi-band receiver/scanner, a citizens band (CB) radio, portable "walkie-talkies" with rechargeable batteries, and a portable battery-powered television. The power supplies may include a diesel or gasoline generator with a one-month fuel supply, an auto battery and charger, extension cord, flashlights, rechargeable batteries (with recharger), an electric multi meter, and a test light. Defense items include a revolver, semi-automatic pistol, rifle, shotgun, ammunition, mace or pepper spray, and a large knife such as a KA-BAR or a bowie knife.
We have several of the shelves from Costco/ Sam’s Club. They are great! Put the thin bar across the front of your shelves, not the back. We have some shelves from Thrive Life that rotate the food for you too. Love those! Bought on Black Friday sales. In the end, do what works for you and you budget and space. Ours has changed many times over the years.
Some Geiger counters can keep track of the cumulative dose for you, but most will simply display the rate at which you are getting exposed - typically in microsieverts per hour (µSv/h) or microroentgens per hour (µR/h; for gamma radiation, 1 R/h ≈ 1/100 Sv/h). To figure out what the reading means, you need to do the math: for example, at 600 µSv/h, you will hit 100 mSv within a week, and 1 Sv within about two months. (The usual background rate from natural sources hovers around 0.1-0.2 µSv/h.)
I went home, shaken and shaking, all of the adrenaline flooding me at once. I slept uneasily, tossing and turning in my bed. I wanted my partner to sleep next to me, but also couldn't bear to be touched. I had nightmares that lasted for weeks: dizzying, confusing dreams where I was struggling to breathe or see but could hear pain all around me, and I would wake up panting and sweating.