The Hifiman HE-400S are currently settled on $228 as a used price at Amazon Warehouse Deals (AWD) among recognizable sellers. Two of the options are Prime eligible (fulfilled by Amazon) by Kraft Street and Audio Advisor (both “Used – Very Good” condition), while Hifi Heaven (authorized dealer) has them in “Used – Like New” but it ships directly from them, not Prime eligible. AWD’s own price is $231.
The planar for mobile/portable use are definitely sustaining their momentum. The OPPO PM-3 is in-and-out of stock but remains at $400, while the used options that remain are only by individuals, none of the usual bigger-sellers have them.
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