Hi Liam -
Looks like you have a really nice Zbu and Newt there
The Starroid Raiders were released in 1977 - these 2 figures are actually Tomlands 1978 re-release called Space Raiders where all the figures had glow in the dark heads . Here is a link to the only webpage I have ever found with decent info on the Tomland lines :
I don't really know a vaule of the figures but I believe the 2nd series glow in the dark heads are quite a bit more uncommon then the 1st series . 1st series figures sell on average for $15 to $20 without accessories . I would think that the 2nd series would be worth at least $30 each IMO . The accessories are the real bitch to get for these guys - each figure came with at least 2 or 3 accessories and I feel the accessories are worth at least $10 each (if not more) .
I love these figures because they are so freaky and I love freaky