Yes....those are all great clues to just move on!!
I’ve had great luck on marketplace....not sure why some people get so worked up about it, you can usually tell if the other person is a flake, or if a deal is too good to be true often it is.
Pictures pictures pictures! Don’t see enough pictures....then ask for more! If they don’t send more pictures, something is up and again....move on!
Also, people need to be nice, understanding and polite...if you don’t think the other person is, then move on....plenty of other parts and deals out there!