Nah... Customers appreciate the approach - at least in my experience. Its all Ive done since I started, and my closing ratio is pretty darn good.
It has a distinct psychological advantage and everybody wins, where in a flat-rate scenario, someone (client or provider) is losing out on every gig.
If you include all you listed for "one low price," there is no getting around it:
You're either giving it away and leaving money on the table in the name of getting business and "being a swell guy," or you're erring in your own favor and some clients are paying more than they would need to if they aren't using those options they are paying your COB for.
There really is no real "middle ground" with the (all-in-1) approach.
Why a) leave any money on the table and give it away, or b) "lose out on some" in hopes you'll "make it up" on the next one? - Charge them for what they need and want!
There is no real right and wrong on this - its just different philosophies and what works for you and your clients.
If it ain't broke - don't fix it!
But yes - If you buy a cell phone, you get a cell phone. Basic, simple, plain... but it gets the job done. Want Blue Tooth? Cough up the dough! Want a case? That'll be $29.99. Want a car charger? Another $19.95.
Why do we think DJ pricing, options & upgrades should be any different?
Can you HONESTLY say you'd be okay in paying a "flat rate" that covered the phone and the cost of all those xtra goodies if you didin't WANT or didint NEED those extra items? And if you PAID the flat-rate - you'de take them anyway just on principle. Except the "flat-rate" DJ customers don't have that option. They don't get a discount or any other tangibles if they don't use any aspect of what's available. They get gypped.
Its either that
OR (and there's no third option) - the provider isn't charging enough to reallistically cover their COB and any kind of profit margin on the deal - in which case I hold back the further commentary!