500 prompts and you're still charging $7 for a PDF that anyone with ChatGPT could generate in 10 minutes. The real value play would be selling the filter that separates the 5 actually useful prompts from the 495 that are just "write a poem about a cat."
If people are buying this, congrats on the arbitrage. If not, consider bundling it with something harder to replicate — like a template that actually ships.