Beomaster 6000 - nice receiver - Advantages - powerful and good looking
Disadvantages - uses unique remote, rather large, prone to failing in one channel due to heat issues.
Value - in good condition with remote - about £100 though could well be a lot less - the market is depressed. The more extras like the box and manuals, the better.
Beogram 6002 - Advantages - reliable belt drive deck.
Disadvantages - one way Datalink. Large. Not an 8000!
If you have a decent cartridge, £75. You could get that just for the cartridge! The deck will probably be difficult to sell.
Redline speakers. - You don't say which ones - probably 60.2s - If they have the straps and are working, £100 if you are lucky. If you have the curly cables, more!
Try eBay. Good photos and descriptions. There is however a lot not selling at all. The 6000 is getting old.