Linked to the one I've ordered mine from, the serial code edition comes in a physical box. Most of their authorised resellers have this deal running.
Blackmagic has announced Resolve 17 coming up, and for a limited time if you purchase Davinci Resolve from most authorised suppliers you'll get a hardware controller for editing ($450 RPP). When Resolve 17 releases you will be able to update from 16 to 17 for free.
I've been using the free version for a while and was considering waiting to buy one of their cameras to justify the cost of upgrading the software, but I've been wanting a physical controller and this looks good value.
In April 2019 the software alone was $413 from at least one supplier I checked.
Most suppliers are waiting on stock, but the one I linked to hints at shipping on the 18th November, but that might be referring to people who ordered earlier, I don't know.
Limited time offer, I only found one mention of a date it might end, being December 31st.
Hmmm, very tempting.
Have you ever tried any Resolve hardware? At the moment I am using an Xbox controller for editing in Resolve.