"How much would you pay for someone to “just come in and play music”?

If we add a top-of-the-line professional PA system, now how much would you say that DJ is worth?

Now let's add a music collection of over 20,000 selections, taking over 20 years to amass? Should one still charge you only $XXX ?

Now…How much extra should one charge for all the years of education and conventions that he takes advantage of, along with the associations and accreditation?

Don't forget about over twenty years of experience.

I personally normally include gas mileage...Do you think that's a good idea?

Oh, and I almost forgot...How much extra should I (err...I mean "one") charge you if you also need professionally-done announcements; like: introductions; your cake cutting; bouquet/garter toss, etc?

Oh! Oh! And I really almost forgot: You are going to want someone to help you PLAN all of this, aren't you?"