Be specific about what you repair
"Repairs" can mean anything from a leaking tap to a phone screen. Give each listing a clear scope: the appliance brands or equipment you handle, common faults, whether parts are included, and whether the customer should bring the item to you or request a visit.
Avoid quoting a final price for a fault you have not inspected. If the work depends on diagnosis or replacement parts, explain the inspection or call-out cost and how you will provide the final estimate.