This early 20th century Happy Birthday postcard with rose has a current value of $15 to $20 retail.
Postcards fall under the category of ephemera, collectible paper items, and special occasion pieces generally bring more
than the $7 to $10 souvenir cards.
Some sites that I recommend for selling are Varagesale.com, Ioffer.com, Ebay and letgo.com.
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