Merchandising your work

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So there's this art show/market coming up and I was asked if I wanted to try selling. I'm thinking of putting some of my drawings on cards or bookmarks, maybe mugs. I like the idea of being able to share my work and make a living off of it, but at the same time there's a part of me that doesn't want to take something that I initially drew as a deep, personal emotional outlet and sell it for money. It feels like it's lessens its integrity.
What would you do?