Seems pretty normal to me. You're making a huge donation to make money for a NPO. If it doesn't sell, they don't make any money so they ask you to donate $10 to get your original donation back. That way they still make money. I've done several charity things like that so to me it seems okay. What they are asking for is a donation---if the quilt sells you've donated far more than $10 to their cause, if it doesn't you're only having to donate the $10. Don't look at it as "buying" your quilt back but as making a donation. That just makes it more fair for everyone involved. If it really bothers you then, next year, just donate the $10 right up front and don't worry about making a quilt for it.