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Diamond 9 Sports Cards in Placentia, CA

4.2 ★★★★☆ 178 Google reviews

Sports cardsPokémonMagic: The Gathering

Diamond 9 Sports Cards sells trading cards at 1850 N Placentia Ave, Placentia, CA. It has a 4.2-star rating from 178 Google reviews. Customer reviews or the shop's own website show it carries sports cards, Pokémon, Magic: The Gathering, Yu-Gi-Oh! and One Piece.

Games carried

Each game is listed only when a customer review or the shop's own website mentions it.

  • “Great experience at Diamond 9 Sports Cards in Placentia!” (Google review)

    Mentioned 9 times in reviews

  • “They had, in my opinion, well-priced pokemon cards, especially for the newest set, and gave some good prices on a handful of bulk cards we purchased.” (Google review)

    Mentioned 5 times in reviews

  • Magic: The Gathering

    More Magic shops →

    “You can find boxes full of One Piece cards and I managed to find a single box of Yu-gi-oh and Magic cards.” (Google review)

    Mentioned once in reviews

  • Same review as Magic: The Gathering, above.

    Mentioned once in reviews

  • Same review as Magic: The Gathering, above.

    Mentioned once in reviews

What collectors say

  • Tournaments & events

    “Eventually I bought a few packs and to top it off my son pulled an incredibly rare 1/25 rookie Ricardo Pepi refractor which is pretty much his dream card.” (Google review)

    Mentioned 3 times in reviews

  • Grading drop-off

    “They can send your cards to be grades (PSA), and they sell PSA and CGC graded cards.” (Google review)

    Mentioned 2 times in reviews

  • Big singles selection

    “They let me check out pretty much the entire inventory on my own and gave me a great deal on a few singles.” (Google review)

    Mentioned 2 times in reviews

  • Play space

    “Wonderful game shop with plenty of tables for big card game events and a active & terrific Pokemon community.” (Google review)

    Mentioned once in reviews

  • Graded & vintage

    “I trusted them with some very valuable cards to be graded, and they came back on time as expected.” (Google review)

    Mentioned 2 times in reviews

From Google reviews

Found this place after a Google search and went over to get a few packs of soccer cards for my son. The owners are very polite, helpful and knowledgeable. They let me check out pretty much the entire inventory on my own and gave me a great deal on a few singles.

★★★★★ Richard, Dec 2021

Fantastic shop. The owners are here are extremely friendly. I trusted them with some very valuable cards to be graded, and they came back on time as expected. I will be coming back to grade the rest of my cards.

★★★★★ Sam, Aug 2025

Came here on a Friday for a card show after Pitch Black released. The show was fairly empty, but when I came back the next morning it was filled out. There's a lot of space for vendors to set up and everyone, both vendors and employees, were friendly.

★★★★★ Jeffrey, Jul 2026

Absolutely beautiful. Amazing employees. Gavin (the best), henry(second best), Rob(the goat), leslie(buys all my cards), pat(goated), and aiden(he’s fine).and krista(used to buy my cards☹️) also kevin i think idk his name. This place is amazing. It’s like a whole new world.

★★★★★ Leo, Oct 2026

Excerpts from public Google reviews. Read all 178 on Google →

Where to find Diamond 9 Sports Cards

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