This is a Season One set of the Carlton Video release for Gerry Anderson’s second live-action television program, Space:1999. The fact you are looking at this suggests you know about the show, and this set. I do not have the Season One box, or the postcards, as far as I know.
NOTE: The discs are Region 2 encoded and utilize the PAL video standard. In other words, if you don't have a DVD player capable of playing Region 2 and PAL discs, AND a television capable of outputting PAL video, you cannot play these.
I can describe and grade these until we actually have a base on the Moon; you can do much better checking my online archive of high-res photos of these discs:
https://imageshack.com/a/jPU17/1
Apart from discs three, four, and six all the discs show no signs of damage or use; discs three, four and six have a minor scuff or scratch on the edge (see included photos). However, all the discs play without skipping and other playback problems.
The inserts are overall in very good condition, perhaps a small crease and bumping to the corners.
If you are seeing this in a non-local context, I can ship these filters. However, I will require PayPal pre-payment, for your protection and mine.
For local buyers, I also accept cash.
If you have any questions, please do not hesitate to ask. Thank you!