After realizing the iMac pro is out of my budget (don't need to spend $5K on computers anymore) and the next mac pro is still a ways out, I recently sold my 6-core/D500/1TB/32GB for 2600 on ebay. Could probably have gotten more tbh, but I wanted a quick sale.
I sidegraded to a 2017 imac for 2899, which turns out to have similar CPU performance despite only being 4 cores, has a way better GPU than the D500s (580 with 8GB VRAM), faster RAM, 3x faster SSD, TB3 so I can add an eGPU in the future, and a beautiful 10bit 5K screen included. A webcam is also a bonus, now I can actually answer calls at my desk.
It's not as quiet as the nMP but the fan is still really well behaved. Also haven't noticed any "throttling" in heavy use (FCP X, Davinci Resolve) that all the losers online spread FUD about.