Costume cards are coards that have a little bit of the costume material attached to them.
Example Character: Jool
Jool wears lots of leather
So you get a little card of Jool wearing her leather outfit and a little square of the actual leather from it kind of sandwiched into the card. I have seen some Farscape Costume cards go for as much as $50 USD.
They can also be called Archive cards.
Autograph cards are cards with a character on it and the autograph of the actor who plays them. Some are quite rare, and only come with a binder.
Right now the easiest (?) ones (and cheaper) ones I am going for is the comeplete farscape in Motion set. (As you move the card the picture moves. Some even have sounds). Also, the whole quotable farscape since they are pretty.
Also, there are extremely rare Farscape ones that were for a contest that, if you got all of them, spelt:Win Farscape Cards
The letter F in the phrase was the rarest (only 50) and unredeemed F card is worth about $800 USD. Yes nearly 1000 bucks. As you can see I will beg my children to buy that for me (that is once I have children).
There are so many cards. Holy Frell!!!