There are a lot of 2nd hand zines for Blake's Seven Please see these pages:
Condition: 2nd Hand (Good Condition)
Puppeteer is a long and sllightly wierd second season story. It concerns Blake, Avon, Cally, and Vila living too close for comfortr on a mission and finding out mor ethan is healthy about one another. Avon, bored, starts playing Machiavellian games, discovers BBlake is homosexual and profits from the information, etc etc. As he gets Blake infatuated with him we're not sure whether he genuinely longs for Blake's friendship or is merely trying to crack him up -- until the end when, of course, Avoon finds too late he is tragically involved... By Bryn Lantry
Slash - (Age Statement Required)
Condition: 2nd Hand (Good Condition)
Condition: 2nd Hand (Good Condition)
Also UFO and Space 1999.
Condition: 2nd Hand (Good Condition)
Condition: 2nd Hand (Middling Condition)
Condition: 2nd Hand (Good Condition)
This is the Horizon reprint from January 1990