Hello,
Maybe I don't know better, but I am under the assumption that stamps should not be sold before the post office release date, is this correct?
Regards and happy collecting.

hola stampsellos,
if it is a usps issue, get some on cover and have them postmarked. you will be glad you did. they will be more valuable than a first day cover. just F.Y.I. from an old collector and delcampe member.

amities,
cajunsr.
member #301, collector for over 45 years, APS member.

I was wondering where the smile came into this. I suppose it is when they have indeed increased in value.

bonsoir BK,
i read linn's stamp news weekly and know about what are known as 'EKU' covers or 'earliest known use'. they are highly sought after by collectors and command premium prices above FDC'S. some stamps were not even released to the public e.g., the rare 'recalled' legends of the west issue, scott #2870 with incorrect image of the cowboy, bill pickett. so the answer is yes, these stamps can be very valuable.

Link (http)

amities,
cajunsr.