If I get asked for a quilt that I don't really feel like making, I just think up a crazy price that WOULD motivate me to make the quilt. Usually it's ridiculously high, like $800 for a simple throw, and that (so far) has kept me from having to make anything I wouldn't otherwise want to make!
And if someone DID want to spend $800 for a simple throw...well, I could find a way to be motivated. LOL