* Set: Different sets have different rarities within them. The 1977 Topps Star Wars series is generally considered to have some of the rarest cards, but so does the 1995 Star Wars Galaxy series.
* Condition: A card's condition greatly affects its value. A mint-condition card is far more valuable than a damaged one, even if they are the same card.
* Specific card within a set: Some cards are rarer than others within a set, even within the same rarity level. For example, the "Luke Skywalker" card in the 1977 Topps set is relatively common compared to the "Obi-Wan Kenobi" card.
However, some of the most commonly mentioned contenders for the rarest Star Wars cards include:
* 1977 Topps Star Wars #1 "Luke Skywalker": This is one of the most sought-after cards in the original set. While not necessarily the rarest card, it's considered a "key" card in any collection.
* 1977 Topps Star Wars #5 "Obi-Wan Kenobi": This card is considered extremely rare due to printing errors and low production numbers.
* 1977 Topps Star Wars #18 "Yoda": This card is considered rare due to a lack of print runs and a high demand.
* 1977 Topps Star Wars #22 "Darth Vader": This card is considered rare due to a lack of print runs and a high demand.
* 1995 Star Wars Galaxy Series #58 "Darth Vader (Red Saber)": This card is particularly rare due to a production error resulting in a limited number of prints.
To find the true rarest card, you'd need to consult with a reputable Star Wars card expert and factor in the card's condition.
Keep in mind that rarity doesn't always equate to value. Sometimes, common cards can be worth more than rare ones depending on the market and collector demand.