With completely wireless earbuds, the rule is: when the battery fails, they have to be disposed of. Not so with the Fairbuds, that allow you to replace batteries in just a few seconds. Combined with a repairable design, the earbuds should therefore have an extremely long lifetime.
I got them on sale for around $110. They might be expensive for wired earbuds, but still cheaper than nice wireless earbuds, including the Fairbuds this post is about. Also, the cables are replaceable in case they ever get damaged.