Great news MrsJB. Well done to H.
Lups, if you need to get three around, then this looks really good imo. It is quite wide, but a tandem or in-line buggy with a buggy board attached would be a nightmare. You can fit a buggy board to a Phil and Ted's but the room for the child to stand is restricted and I believe you have to remove the brake or something. I would measure your front and internal doors to see if you'll get it round, or will need to fold in the hallway or whatever. It's likely to fit through the front door.
The only issue you might have, is in "old fashioned" shops. My corner shop, for example, just squeezed through the Mountain Buggy at 68.5cm wide, I imagine the door opening is about 70cm. Your Quinny is 65cm wide and the one you're looking at on ebay is 76cm wide. Best thing to do is look at the clearance you have in doorways with the Quinny as you go about your business for the next few days. If you have about 5cm to spare each side of the wheels, then you'll be fine. It looks like a great buggy. I saw a lot of those toddler seats in Sydney. Very popular.
If you were thinking twin with buggy board, the more lightweight twin strollers are narrower. The Buggy Board Website has details about to which buggies you can fit a buggy board easily, with difficulty, or not at all. HTH!