Came up in Whirley pop since you can use those to roast coffee.
I did for a few years. First I used an earlier model Fresh Roast
which is like an air popper redesigned for coffee. It was great, except it makes only a quarter of a pound at a time.
Then I got a Behmor
which is like a toaster oven. It wasn’t really suitable for roasting as dark as I like. One day it caught on fire, so I moved on to a HotTop
which was excellent, except that cleaning it was a huge pain in the ass. You have to disassemble it, and it’s not easy to put back together.
I might try a Gene Cafe roaster someday, seems like it was designed with cleaning in mind.