I'm using the same two computers I was using when this thread was created. One is a 2008 Mac Book. It is mostly idle these days. The other is a 2009 HP desktop running GNU. I hate Windoz and purged it from the HP in 2013 because it kept crashing. I bought a flip phone for my new business. I don't intend to use it very often. Mostly I'll use Skype for all of my outgoing calls.
Technology has helped me to sell many items via the internet. It helps me to shop and to learn the value of things I want to sell.