I love the 12-inch MacBook, even with its single USB-C port. It’s thin and light, even to the point that I feel like I’m typing on the desk rather than a regular laptop. If that kind of thing sounds appealing to you, you’ll be happy to know that Woot (a division of Amazon) is currently selling various certified refurbished 12-inch MacBooks from 2015 for as little as $700.
The $700 unit is the 256GB configuration (and, for what it’s worth, I’m happily writing on the 2017 version of it). Unfortunately, if you want it for that price, you’ll have to be okay with getting it in gold. For a bit of comparison, similar (non-refurbished) models are going for $900 over at Amazon proper.