I'm not the world's biggest Star Trek fan, but I am a fan of all incarnations of the show, going back to the original series first aired in 1966. I don't collect a lot of Trek memorabilia but will buy stuff that interests me when I come across it. Plus, anything Stat Trek is a good fallback for my family (especially my daughter) when birthdays and Father's Day rolls around.
I saw an article on 1976 Topps Star Trek cards on IO9.com. I'd never heard of them before. I had to have a few so turned to eBay. Quite a lot of them are for sale and they are not real cheap. An unopened back goes for $40-$50.
I managed to find three cards from the same seller that looked interesting. Outside of the fact that all three of them are off-center, they are in good shape with nice hard corners and no markings.