Thats what they were saying to many people not picking up parts. Hard for me to understand that, but guess it could be true.
I just don't like the balance of power by paying first. Seems to be a bad position for the customer and thats why in most cases I won't do it.
I understand nobody wants to loose any money but there are risk for both the business and customer in most all transactions. However if you pay first then all the risk is shifted to the customer or at least thats the way I see it.