Of course you have no basis for your claim that he would have eventually found a buyer. This is a "manufactured criminal" and the police certainly got fed up with waiting for an actual market for his work to materialize. Entrapment is so insidious because when you turn a good guy, maybe there's no market for "good guy's evil works" anyway. (Who knows why, maybe he looks like an informant/plant/mole because he's a real artist and normal, genuine, good guy, who only got into 1 single crime - and no corresponding culture or connections, no other crimes, nothing - through an entrapment operation.)
Please read the article more carefully and you'll see exactly what I mean.
This is why families and old school friends frequently figure together. And why jail makes for furure partners.
Perhaps we should start oldjailbuddy.com - networking for criminals
It's like if entrapment convinces your performance-oriented daughter who's short on cash (to make this an analogy with the artist in this article) to have sex for money as a kind of performance (same convoluted logic as the artist's in the article).
If afterwards she tries again, there's no proof there's actually a criminal market for her and her criminal soliciting skills learned for the entrapment. But she may or may not know that. One entrapment operation can ruin your daughter's life, who perhaps had literally never given a single thought to prostitution, just as you and I have never thought of armed robbery. It's like a fucked-up internship offered by the government, only instead of setting you up for life with your newfound skills, it fucks you up for life, as in the case we've just read about.
Regardless, since just printing the counterfeit notes is illegal he became a criminal by creating them, not by selling them to the police. The entrapment did not create the crime, Kuhl did.