Avoid vague messages such as send your best cards or I need only profitable cards. Profitability depends on your market, fees, and sales process, while exact assortment options depend on current supply
If you wish, you can choose to leave some or all the cards with the same name as the targeted card, including that card, in the zone they're in
This could explain why people claim to have seen topsun cards as early as 96, as Game Freak was known for giveaways to market the brand
In addition, secure your cards with cardboard, postcards, in a deckbox and/or use a toploader to prevent damages to the cards
think loyal alignment in D&D, if you will
And then theres the market side: Rare Charizard price spikes Graded cards selling at auctions Long-term trading card investment market discussions Condition grading and card grading authenticity A collector on a forum once wrote: I dont collect Pokmon cards because theyre valuable