Collectors make a few predictable mistakes. Here's what to avoid:

• Ignoring the product type. A roast date on a mug is not the same as on a coffee bag. Don't treat them equally.
• Assuming older means inferior. For collectibles, an older run can be more desirable. Don't skip a piece just because the date isn't recent.
• Trusting the date blindly. Anyone can print a date. Verify with the brand or seller if authenticity matters.
• Forgetting about storage. Even a fresh date won't save beans that were stored poorly. Ask how it was kept.