My first thought was to make up as complete as I can pokedexes for each generation, but then I thought it may be best to group them by set instead - base, jungle, fossil, etc... Or maybe try to do both, but that would definitely leave wider gaps within the groups.

Also, what about starters? That is, I have many extras from several gens/sets. I know the original 3's cards can still be worth a decent small amount on their own, is that true of the other starters as well? On a similar note, how best to deal with extra Evee/lutions?

Last question - in case of holos and first editions, where I have "plain" extras as well, would it be better to include the holo/1sts in the larger groups/collections, or the "plain" card, and sell the holo/first either separately or in larger groups of holos and shinies depending on the card?

Any advice welcome, thanks