The last-gen Sony WH-1000XM4 headphones are now a staggering $220 off

Photo by Chris Welch / The Verge

Amazon’s Prime Big Deal Days sales event begins tomorrow, but the best tech deal around may have already landed early. The Sony WH-1000XM4 noise-canceling headphones have dropped to a new all-time low of $129.99 ($220 off) at

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