It looks like it has leukemia, judging by the green mucus around the face. Make sure you get a leuk test by the vet, and if he's positive he has to be a house cat so he won't spread a terribly painful disease...
I'm not keeping him... but I'll get him a name tag, his new owner can name him whatever they want... this cat is soooo weird... it loves having it's 'armpits' scratched lol
he also constantly kneads the air