I beg to differ rusty!!! For those taller folk, the X1 has quite a bit more headroom than the Q3, which can feel cramped. With the premium package, LED headlights, and stereo upgrades, the X1 is sharp looking with the standard quality BMW interior. (FWIW the highest trim of each the X1 and Q3 look great, while their base models leave a lot to be desired)
With 5000+ miles you should shoot for at least 15%. I believe that I remember seeing in a recent broker listings that specifically sDrive X1 and X3s are still being discounted aggressively, so you should be able to negotiate as if these were normal times, given that detail
[Edit: This 
is the post I was referencing]
Feel free to shoot me a DM if you want the details on the X1 loaner I negotiated last year (Or you can search through my posts). We got ~3k mile sDrive loaner at 41.5 MSRP, which had Premium Pckg, LED headlights, and Sport seats (which I highly recommend compared to their base seat). Here’s the Spec:
At 39.3k, I assume you have only convenience and maybe heated seats/steering? Definitely not fully loaded, which is probably 43k+ for an sDrive