Why don’t you require a deposit or payment upfront?

Because I trust my customers, they trust me and this arrangement just works.

I’m fortunate that my business brings good, honest customers. I’m also pretty good at filtering. Naturally, people also want to collect their repaired and serviced equipment, so I don’t worry about this. On the rare occasion that something is not repaired, the costs incurred in getting to that point have already been discussed.