E9 on Amazon from several distributors for $28, though I can't find that price on the individual web sites. Is the E9 discontinued?
Also, does the E9 act as a stand-alone DAC or do you need the E7 docked.
It's an error. I have ordered 2 units for $28.00. You will have to google for Fiio D3 then it will show the Fiio e9 for $28.00 from Amazon.
They will have to honor the deal since it's a legitimate ad untill they retract the offer to the public.