Now can I sell the guns I have to someone else?
Shame on you, you have abused the 'Gun Show Loophole'. Otherwise known as the right of Americans to sell, buy, trade or gift guns to one another. What you did is no different that getting the family shotgun from Grandpa.
Depending on your state of residence you may have violated some state laws. For instance, in NC all transactions involving handguns should involve a permit from the local sheriff.
As for as selling the guns you have, you would be best advised to ship them immediately to a FFL dealer whose name I will email to you. He will turn them over to me, and I will keep them safe.