Haven't been on in quite a while, but I got a lot of information from this forum and figured I'd let you guys have first dibs.
I bought the full system years ago for $285 and it has pretty much lived on my bike since. It comes with the luggage rack (the tall one), the "L brackets" that fit all 919 model years, an extra fastener thing (That is used to keep the rack attached to the brackets, the mounting bolts, 3 of 4 of the original plastic bolt covers, and the grab-handle for when you don't want the whole rack mounted. There's also the little "key" to tighten/loosen the fasteners.
I recently upgraded luggage, and have no need for this rack anymore. Let me know if there's interest.
It's in perfectly working condition, just looks well used.
The pictures were too big so they're on an Imgur album; https://imgur.com/a/8OwkkGq
The last two pics are just referencing what it looked like on the bike, both images are pretty old. The first two are what the pieces currently look like :].