Beovox 2400 - nice speaker but fairly nominal value.
Beomaster 1000 - lovely amplifier - you don't say if black key or white (very different!) but again probably less than £50
Beovox 2500 Cubes - Lots!! If in good condition these are worth several hundred pounds! Advertised well on eBay with the ability to ship internationally (Think Japan) and these can get serious money. I have seen a pair go for over £700 though this was exceptional. Certainly over £200. Don't sell them for a song!