At the cost of a simple discard, Maxx "C" allows you to draw a card each time a Monster is special summoned
Water Resistance: Prevents moisture damage to your decks
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Since then, things have gotten better for the mechanic, and a lot more varied and versatile Pendulum cards have been released, but I suspect that very few decks outside of Arc-V (and a few Challenges) use them, precisely due to the archetype limitations baked into several of them
Here are some tips: Examine the Card Quality: Authentic Japanese cards feature premium cardstock and vibrant, precise printing
Newer releases that havent had time to be graded a ton make our grading results a bit less reliable, and newer releases also tend to sell at much higher prices right after release and right after the first graded versions start to hit