Some of these people would think free was too expensive so you have to take what they say with a grain of salt.
Sometimes you can turn these calls into more work and make the customer happy also. When they call and ask for a small item that doesn't meet the minimum say something like this: "We have a $95 minimum charge and this would surely cover your repair, but if you can think of a few other small items we can probably do them also for the same price or not much more"
Also, try to stay away from mentioning hourly rates. A guy making $15-$20 per hour or even more can't fathom pay a lowly electrician $80 or more per hour. He doesn't understand your overhead and cost of doing business, he thinks you're trying to make $80/for yourself(which I'm not opposed to).
