I have a few coins that I love and made some T-shirts with their logos and my down design incorporated with them. I showed some people and they are interested in buy. Are logos copyrighted or are they public domain? Can I open a shop with products having alt-coin logos on them? or would I need to contact each developer team?

Sorry about the mistake. You guys know what I meant 

Brand new Tmobile Galaxy S7 Edge. No scratches or marks. Looking for around $500. Tell me your best offer.

Pics:
https://imgur.com/a/cFCSq

Bought through his autopay, and there was nothing in the email. No account.