Yup, that's exactly what they said.
I've been looking around. I've found 2 sets for the 98 Fazer, both between £550 -- £600. Not Givi, obviously. It's apparently for brand new (or at least unopened) kit.
1.) Wingrack, fitting kit, 2 panniers. The rack and topbox are optional extras.
2.) Wingrack, fitting kit, 2 panniers, mount for tobbox. The topbox itself is not included.
The details for the latter aren't clear so I've asked for a confirmation.
How do these prices look? Are they bargains? About right? Way over the top? It seems reassuring that they are both in the same ballpark.