We've recently had these 3 young cats show up on our porch. The white one has a flea collar on but she's out here all day/night the last 3 days. The two young kittens are dirty and nervous around people. If we stay still on the porch they will run between us. But I'm lost on what to do now. I cannot take them inside as we have 6 cats already. I was wondering

For everyone's safety, meet in a public place and never send money to strangers to recover a pet. Verify anyone who claims a pet before arranging a meeting.