Yes, you should be able to do that, unless you are reasonably certain that the information might be used to commit credit card fraud/identity theft.

If you think they might be used illegally, I believe there are already laws to charge you with that relate to facilitating a crime.

If you don't think they will be used illegally, then what's the harm in selling them to someone else?

The credit card example was already illegal by other, more targeted legislation.

Nobody likes getting a lot of junk mail, but it's not the end of the world. I actually got my first credit card from a pre-approved offer found in junk mail.