DISCLAIMER: before you make an offer or buy one of my NFTs go to the link provided with each one of them and make sure you download the full resolution file first. I'm not responsible for missing links or original photos that were taken down for whatever reason!
NOW: Prints don't last, so I keep my photos digital.
Most of them are published in Wikimedia Commons, Flickr and other sites under a Creative Commons license: if you like a photo and want it on paper, just download and print it.
Of course this makes it impossible for me to sign at least one of them but now, with NFTs, this is not true anymore!
In synthesis: my photos are freely available in full resolution; here you can get my digital signature for some of them.