No offence to die-hard fans here, but if you haven't seen this show in 20 years and have fond memories of it I strongly recommend renting before buying.
I too loved this show as a child, anything space-related or similar to SW was fine by me. But a few years ago I rented the "theatrical" movie pilot of Battlestar. It is god-awful! The effects, the "plot", the acting....uugghh. The Cylons were still kinda cool, but...let's just say I had a hard time finishing the video.
IMO your money would be much better spent elsewhere.