I had a similar experience with the adorable Charmander and Charmeleon duo - it helps that my kids absolutely love them, and are also big enough that instead of throwing cards around the house like confetti they love showing each other 'how cool they look' (their words, but also, they're not wrong)
If you like, you can skip ahead for a full explanation of how we chose our favorite cards
Lands are also in this category it's fine if this search turns lands up as well
It'd also a 15% discount, saving you $24.71 on the full Play Booster display
If you can't find another partner to support Slurrk, you can always pick a partner that allows you to use another color in your deck
For higher-value cards, choosing a graded copy is the common-sense move, since professional grading settles both condition and authenticity in one step