Used Beyerdynamic T51i Portable On-Ears for $139

This is another listing to keep an eye out for. Even if the current price is not tempting enough, the bottom may fall out and create a “falling knife” type of a situation. As of the time of writing, there are a lot of listings of the Beyerdynamic T51i Portable Closed On-Ears in “Used – Very Good” condition for $139~, all of them by Amazon Warehouse Deals. If they don’t get sold fast enough, their pricing system will likely discount them further to entice shoppers. No one outside Amazon really knows how exactly the discounting process works, we are of course all guessing, but that’s a lot of listings for a headphone model that is more known to audiophiles than average consumers. It averages 4.2 out of 5 based on 84 customer reviews.