Bought my 2017 open box certified from Best Buy for $826 in April 2018, using it to write this post. It's been a great machine. Yes I'd prefer a 13" screen and a higher res webcam, but Apple should be able to put those in this size/weight by now. When you're used to two pounds flat, even the MBA feels like a brick. But Apple has become like a big car company now: incremental yearly model change with primary focus on extracting maximum economics from the mass market. They won't bring a 12 inch back; if you want that kind of portability, they want you to buy an iPad Pro.
I rue the day when even the current iPhone 13 smaller size (which isn't small) is increased for the same reasons. When they make iPhone 15(?) only available in Max and MaXL, it'll be so more people buy Apple Watches.