Counterfeit implies a copy of something that has a defined market value. Academic papers don't. What I did is closer to a tailor creating a suit for someone from scratch, rather than someone operating a sweatshop to produce fake suits from some known brand.
In the "marketplace" of education, the paper was the token that the student expended the mental effort of doing the work, which would be graded on its merits as a sign of what he should have done. You faked that token knowingly. Your customer did no work, and the professor would never have accepted the monetary equivalent of what he paid you for that work. Not at any multiple, if he wanted to keep his job and the university its accreditation.
Did you get paid for them? If yes, they had a market value. That's the most basic definition of a market--a buyer and seller negotiating and agreeing upon a price for a good or a service. "Market" doesn't mean commodity. Hopefully you weren't writing anyone's economics papers...
