Fishler is clear on this: If you think you have something valuable, send it to a grading service, and they will grade it and send it back to you in a holder. The major grading services are PSA, which commands the highest resale values, and CGC (Certified Collectibles Group), which can be more cost-effective for bulk submissions
Meeting the Mythical Pokmon Pecharunt granted its wish, transforming it with enhanced abilities and mesmerizing looks
Union of the Third Path might be the lowest level of payoff, but I see this for Mardu builds that sneak in a Sanguine Bond kill
Sleeves/Toploader If you're looking for a simple and affordable option, sleeves might be the way to go
If this works out, Gamestop may be able to influence the market price of relevant singles
If there is no black layer, then the cards are probably all fake