There is an excellent business model for selling dead legs in biz jets in usa .
http://jetsuite.com/suitedealIt probably doesn't translate to the majority of helicopters operators in oz but worth a look if you travel to the states and want to splurge.
They have a fixed price of $536 for the entire aircraft (4 seats) on short flights on their most common 4 seater biz jet. Longer flights are double .
They advertise their available flights with 24hrs notice and they usually sellout. Around 10 flights per day from and to all over the USA.
The online sales process is linked to a set of terms and conditions so no person to person interaction is required until the punter has paid for the trip on credit card.
The company run quite a few biz jets, they don't broker for anyone else.
Having just returned from holidays in the states yesterday I monitored the site hoping I'd get lucky with a flight in the right direction that slotted into our travel plans. I was prepared to make diversions as $500 is a cheap thrill and bragging rights for the kids! (about same price as a day for 4 at six flags with fast pass)
Mickjoebill