Make a clear claim
The Bluffer controls the message, not the final Trade or Keep button.
Start by deciding whether your description will be truthful or a bluff. Keep it simple enough to deliver consistently. Complicated claims can create confusion without making the story more believable, especially when the public game information does not expose a shared value chart that every player can check.
A strong delivery can influence the Decider, but it cannot guarantee the result. Avoid claiming that a Squishy has a rarity, price, or special power unless the current game actually shows it. The Bluffer view in the Decision Helper gives preparation prompts and deliberately avoids issuing a Trade verdict.