I have a few N4’s and they’re nice guns. DD is legit and basically every bit as good as a Noveske. The Noveske name and lore was built on the personality of John long before there was a flood of other manufacturers, like BCM, DD, etc.
They tend to use more off-the-shelf parts now, like AGM triggers, etc. Their billet lowers and uppers are still solid and desirable.
$1500 is an absolute steal. You could make a quick $500 on it if you don’t keep it.
If you don’t buy it, PM me his deets and I’ll take it off his hands.