Iphotostock

I was wondering where I could sell my pictures so I asked it here and I was told to go to photostock.com. I went there I found the only good thing was that I was wondering if you had to pay to be part of the community. In addition, he said you had a certian age but he never said how old .... no idea?

Membership is free.
The age limit is the legal age is when you are no longer treated in law as a minor. This varies by state, here it is 18 +. you'll need to check the law in your area.

Do you mean istockphoto.com. Register with them and they will provide all the information you need.