Most legitimate shops can guarantee authenticity, as there are many fake cards in the Pokemon trading world
This makes it easier to get 1 hit knockouts against these Pokmon
Prior to the Sale All items (hereinafter referred to as item(s), lot(s), article(s), antique(s), property, etc.) for sale are sold AS IS and Matthew Bullock Auctioneers its agents, employees, and/or consignors do not make any guarantees, warranties, or representations, expressed or implied, with respect to the items or the correctness of the catalog or other description of the authenticity of authorship, physical condition, size, quality, rarity, importance, provenance, exhibitions, literature or historical relevance of the property or otherwise, except where applicable under the Terms of Guarantee (applies ONLY to published catalog auctions, NOT Online Only Auctions)
Then list those cards on TCGplayer so your inventory can do more for your business
The ones included here are an Amber/Emerald deck and an Amethyst/Ruby deck