Used Acoustic Research HP1020 in-ears for $13 to $16

There are multiple lists of the Acoustic Research HP-1020 earphones at Amazon Warehouse Deals in “Used – Very Good” condition for $16 (was $13) per pair, while there’s also one “Used – Acceptable” for $13 (was $11). Since there are so many listings, there is a possibility that prices may drop further down if the Amazon computer decides these are not moving fast enough based on available inventory (this is only speculation since I don’t know how it works behind the scenes)… Price updated here on 3/23/15.