Make sure you get them from trusted sellers. I have gotten burnt on eBay three times out of the many things I have bought on eBay - ALL of them were B&O products. They looked great in the picture but when I got them all three failed and I ended up trashing them - luckily they were not as expensive as Beolab 18s. Others I know have been very lucky and ended up with amazing deals.
B&O products I use by zones in my home:
Platform: Apple Home (iOS/Mac, with Google Wi-fi (3x mesh), 100% streaming audio (Sirius XM, Apple Music, YouTube Music); TV/Office: Beolab 8002 (Red) + Beolab 2 [Sony 65A1E OLED TV, Apple TV 4K]; Living: Beoplay A9 (MK2), Bedroom: Beolab 6000 (Red) + Beolab 11 + Beosound Core w/ Essence Remote [LG UST Projector directly to wall (appox. 75 inches), Apple TV 4K]; Guest Rooms: Apple HomePods; Dining: Beoplay M5 [previously BS Stage] ; Portable in-house: Beosound 1 with dock; Travel/bluetooth: Beoplay P6, BeoPlay H9 (3rd Gen), Apple AirPod Pro.
Yes, I bought a pair, and they are superb with no problems what so ever other than not having the boxes (Which I am now trying to hunt down) and a real bargain, all I need now is the BL/19 sub to finish my system off nicely.
Good to know. I've been looking out for a pair of BL 18 + BL 19 or BL 20s to upgrade my current BL 8002 + BL 2, and seen a couple of solid deals on eBay 🙂