PromptBase

PromptBase is an online marketplace where prompt engineers can sell text descriptions that will reliably generate specific art styles and themes on various AI systems. When you purchase a prompt, you get a string of words that you can use on GPT-3, Midjourney, DALL-E, or any other AI system you have access to.

PromptBase is a great way to get the best results while saving money on API costs.

Source: https://www.theverge.com/2022/9/2/23326868/dalle-midjourney-ai-promptbase-prompt-market-sales-artist-interview