Any ban?
No, if you mean VAC banned. I don't know if there's any other type of ban, but no as far as I know.
There are community ban and trade ban.
You can check all stats on steamdb.info
Email?
I... don't really know. I think it is verified.
I think? You have to
know.
Email included?
It can be changed, when you get the account just change the email.
When you selling a Steam account, people like to buy with email which is associated with it (the email on Steam).
Because sometime account gets banned because of email changes.
Screenshot?
Regards!
Not much you showing here.
Account age (Profile creation), account level, digits (3,4,5,6,7 or
8) and so on.
People like to know that things before they buy.
Also account price depends of it in many cases.