It is a good list of kit; items will probably sell separately quit well e.g. I have bought the remote previously simply to have a cheap remote for guest rooms.
You should inspect the speakers on the inside, take a look at the speaker cones and look for any signs of deteriation of the rubber surronds, what we all call "speaker rot". It can be repaired but you will need to inform potential buyers of the status of the speakers - post pictures of the cones in situ.
If you look in the vintage forum you will see there are a lot of enthusiasts who enjoy buying old kit and restoring it as a hobby.
Also there is a sellers forum, but you need to have the right membership level to sell through there. And it is always polite to make a donation to a site when you are looking to make money through using its facilities.
Just check you have listed all the equipment, for example is there a black box that connects the second pair of speakers to the system ?
First B&O (1976) was a Beogram 1500 ... latest (2011) change has been to couple the BL11 with the BL6Ks *sounds superb*