I'll tell ya, there are definitly a few cakes I wish I would have said no to! I'm not so shy now. I either let them know that I'm already booked (if that's the case) or that I'm simply not available that particular day. Also, price can be a factor. If your cakes are priced appropriately, you'll have several clients who simply won't be interested after you've given them an estimate. Few are willing to pay my $3.50 - $4.00 per serving for a 10-15 person birthday cake.