Methinks they were the first but I may be wrong ofc
BTW I was chatting 530d's with Dad who said they were offered £14k trade-in on their then 3.5yr old 55-plate 530d SE auto touring with sub-60k miles on the clock. That was late spring this year. It was approx £36k new so it's a healthy saving if you can bag one.
Goes to show pistonheads current prices are both all over the place and very high considering the time of year. Maybe as winter sets in good and proper the prices might weaken a touch.