Are really old letters postcards and birth certificates worth anything?

Yes, really old letters, postcards, and birth certificates can be worth something, particularly if they are rare, in good condition, or have historical significance. Collectors often seek out items with unique stories or connections to notable events or individuals. The value can vary widely based on factors like age, rarity, condition, and demand among collectors. To determine their worth, it's advisable to consult with an appraiser or a collectibles expert.