There are 15 different rarities that Pokemon has used within the past 4 years. The top 6 rarities (energies, C/UC, RH C/UC, R, RH R, and HR) are the rarities that are most commonly sold for bulk, C/UC being the most frequent.
- Some companies might take promos as holos, but confirm with the company before you package up your cards.
- Most stores do not accept World Championship or foreign language cards, but you may ask the person you are working with if they do.
Card Mavin - Has detailed pictures about rarity symbols, and where they are located.
Virginia Pokemon - shows pictures of the different rarities, and key distinguishing features.
Flipsidegaming.com - Has a longer explanation for each era of cards, so if you have older cards, check this out.