Hi, I'm from Germany and here we have to kinds of Internships:
Paid - internships in this category normally pay 400-500€ and are tax free
Unpaid - mostly done to fulfill a requirement (study, course, etc.), is just like the name said unpaid.<p>There is then quite a jump (in earnings and requirements) for a trainee, and nothing really in-between.
I'm currently an intern with USDA and make ~$13.50/hr, with a "salary cap" of $14.50 for any intern. All internships in my area (Colorado) that I see are between $10-$20/hr depending on the position.