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I think its a great idea. Looking forward to seeing them when they arrive.

Can you use them to send them to snail mail or do you just collect and trade them?

It looks like there is a physical stamp you can use with these too. Once I get mine and I acn get on the trading part, I will see if there is a difference in price between used and unused NFT stamps.

Cool. You can send me a postcard with an NFT stamp😀

I will see if it is domestic or international post. Lol