Soundmagic PL50 in-ears for $39

The Hifiman eBay store offers the Soundmagic PL50 in-ears for $50 but the Hifiman Amazon store undercuts themselves by offering them for $39 with free shipping. These are fulfilled by Amazon, so Prime members get free 2-day shipping. They average 3.1 out of 5 based on a not-so-lucky 13 customer reviews. The complaints are about construction and durability, the praise for the sound.