Asinine business practices

So we're talking with potential DJs for our wedding. One guy quotes us a high rate, and we try to negotiate. His response:
"I can't lower my price - it wouldn't be fair to my other clients."
Seriously? Seriously. What kind of person thinks that this is a convincing argument. Why should I care about his anonymous clients who I will never meet and have nothing to do with our wedding? Estupido.