When Adam and Jerry are in the car outside the memorabilia shop to retrieve the baseball card, Jerry has a three-day stubble. When they get back to Five-0 headquarters, he's clean shaven.
For the baseball card to be worth that much, it would have to be professionally graded by PSA, SCG, or the like, and be in a case from the grader with authenticity bar codes and serial numbers. It is just in a plain Lucite screwed-together case with no authentication or grading attached.
At the Grover family brunch, Captain Grover's dad tells Percy that the only reason he's awake that early is that they're 5 hours from Chicago time. Thanksgiving falls during standard time and Chicago is in the central time zone, which during standard time is 4 hours ahead of Hawaiian standard time. Chicago is only 5 hours ahead during daylight saving time since that is not observed in Hawaii.
Later on in this episode, there is absolutely no mention of the circumstances that lead to the death of the thief, Michael Chan, who was found crushed under the safe. When Tani and Junior are questioning Patrick, they do not mention Michael Chan even after Patrick admits to breaking into the safe, putting him at the scene of the crime. The death of Chan seems to be no longer an issue for the rest of the episode.