I take it you have the Beogram 6000 as well. I would definitely sell 
these on eBay - you should list the components separately though on the 
whole, I would put the Beomaster and remote together unless you have a 
very silly offer for the remote. The Beocord is unlikely to work 
properly and is worth little but the Beomaster and Beogram are both 
highly sought after. The remote is also very desirable - don't accept a 
cheap price via PM here!! 
If these are boxed, they are worth a 
serious amount of money - good photos and descriptions are a must - do 
so and you can expect a very good response. Do you have the trumpet 
stands to go with the S60s? They will also add a considerable amount to 
the price received. 
I have this system though I have disposed of 
the speakers and the Beogram is now used else where. It is not the best 
performing system even of its time but is a particularly beautiful one -
 possibly the most advanced design B&O has made. Quad records still 
have a certain mysticism to them - in truth, they were a fascinating 
precursor to surround sound and although they are likely to actually 
sound pretty poor as the reproduction is very dependent on record wear 
and a cartridge at the very top of its game, they are still very 
collectable.
Happy to offer any advice you need.