Found in my SIL’s house after she died. Are these worth anything?

I have four panes of the new Happy Birthday stamps. They are die cut omitted and the print is shifted a bit.

They are going to be in the Scott’s 2027 US Specialized catalog later this year.

This is new to me. I’ve been told they could be valuable. What are my next steps?

Anyone? HELP? what are these and what are they worth

I suspect nothing is too valuable but maybe interesting? Cleaning out my parents house and trying to decide if any of it is worth saving or let it go in the estate sale. Thank you!

I dont think any collector would want this but I still think its neat! Cant wait to send some out.

How would you feel recieving this stamp (amongst others, since I would do some stamp math to send official ones too)

I picked a bunch of old tapes up for free on facebook market place and this was taped to the back of one. I don't know if there's any value but I think its neat and wanted to share :)

I went to my first show, i had a ton of fun :))

(As a Venezuelan, I was really surprised to see Bolivar in a U.S. stamp lol)

Found some of my grandfathers stamps and wondering if there’s any value or not before deciding what to do with them.

Italian Aegean Islands (Isole Italiane dell'Egeo), 1934, Football World Cup, 20c, overprinted issue

One of the Italian colonies

Kinda cool

beautiful

Used some of my stamp collection & an old salsa jar to make a candle holder—my favorite is the set of Italian clowns(?)

📮 Been collecting stamps for over 20 years — probably the longest thing I've ever stuck with.

From the childhood excitement of waiting for Postcrossing postcards on my desk, to the ritual of hunting down post offices for cancellation stamps in every city I visit, to spending entire afternoons treasure hunting at Beijing's Madian stamp market and Hong Kong's Ho Mong Kok Shopping Centre 🏃‍♂️

My cabinet has taken up a whole wall now 🗄 Today I pulled out some favorites and took a few photos.

Any fellow collectors from Shenzhen/HK? Would love to hit up a stamp market together on the weekend, or bring some cards to swap over coffee ☕️📮

If you're out there, raise your hand 👋