Yes, it still has an higher value regards to specs,
It's like if you buy a Renault/Fiat or a BMW, for the same specs, the price is different when you sell it second hand.
Look at ebay, and you will see the prices, these are the ones I quoted.
DM produced 60k DM8000HD boxes in total in the whole period it was sold. Clones were a lot lot less produced than DM quantity.
Try to sell second hand your Gigablue, Zemma, etc... nobody will want it. So value, zero as second hand.
TS
350 euro wow
Id seak a box with much greater spec from VU+ or Gigablue for that money.