I have a customer who owes me $175. I have sent multiple invoices and called and texted them several times. They will no longer answer the phone or respond to texts. They have not made a payment in over 2 months. Is this small amount worth going to a lawyer or collections agency? Even if I pay a collections agency most of what I make, I would like to do it just on principle if it's not going to cost me too much time. Any advice?