I received my nRF52840 PDK from Symmetry Electronics right after Christmas. I have been doing some basic Bluetooth / BLE 5 experiments (including building a sniffer) recently. 
 
A note on Symmetry Electronics ... They were running a promotion before Christmas in offering discounts and free shipping on Nordic Semiconductor development tools. Long story short, they screwed me out of free shipping. I won't go into the gory details, but suffice it to say that when I checked out my purchase from their website, it clearly showed my shipping was free. And then it wasn't. I can NOT recommend them as the most honest / trustworthy distributor to order Nordic supplies from. Just my personal experience. 
 
The board... 
 
Click to embiggen (~3MB) 
 
The part... 
 
Click to embiggen (~1.5MB)