I’ll have to say I’m fairly new, so perhaps there are very good reasons for it, but my first instinct says this is not completely how it should work…
As I’ve gotten interested in Trading, I’ve trained ‘Procurement’ and ‘Visibility’ the last few days, so I can easily place Buy Orders remotely, with a nice buying range, from a distance. However, it is not fully working as expected: when I’m in space and want to place a remote Buy Order, only NPC stations are displayed in the “Select station” list that pops up. Player structures do not show (e.g. “Audaerne - SiCO Trade Center”, my alliance’s HQ), so at first I almost thought I had wasted my skill training time.
After some messing around, I did find a workaround for placing a Buy Order while in space, at distant player structures, but I’m no fan of it AT ALL: I first have to select a random station to get the “Buy < product name >” screen and there I have to right click the randomly selected Location -> Select Station and THEN I can finally search for player stations. Multiple extra actions, in which extra mistakes can be made.
My suggestion: when you’re in space and select “Place Buy Order” replace the current “Select station” list with the “Select station” search function, that also pops up when you’re in the “Buy < product name >” screen, when you try to change to location.
Alternatively, change the “Select station” list so it displays all Solar Systems in which you can currently sell (based on your Procurement skill level) as collapsed groups and upon selecting/expanding one of them, display all stations and structures with (accessible) market facilities in that system.