It’s not often that some of the best noise-canceling headphones you can buy are over half off. But right now, the first-gen Bose QuietComfort Headphones are on sale for $169.99 ($190 off) at Amazon, Best Buy, and Bose, matching its best price to date. The newer, second-generation version that launched in August is also down to $199 ($160 off) in multiple colors at Amazon, Best Buy, and directly from Bose, which is just $20 shy of the all-time low price.