When in station, make it possible to select and sell more than one item at once. That way players can sell all unneeded items from their station inventories at once without selecting each old ship or weapon they no longer need at once.
This may sound like a small issue but in a while of flying, a lot of stuff you randomly pick up starts sitting around in the stations you commonly use, let alone the ships you used to fly there for one-time use just to pick another ship. Selling this all at once would save a lot of time.