I think some really expensive stuff might actually sell more because it is expensive - caviar anyone?
Veblen goods is the term you're looking for.
I wish I could remember the name of this device, but it was essentially a MP3 player with no screen
I just want to point out that when a blind person walks down the street, the last thing they need is music coming out of their headphones, blocking noises from the environment.
Now, if you manage to integrate effective guided GPS navigation for pedestrian walkways into such a device, then you're in business.
Why the hell is this in a science museum? There isn't enough real science for them that they have to have exhibits of sci-fi? Great way to pass off entertainment as education.
Actually, this is a big improvement over the last major exhibition the museum hosted, which was on the life of Princess Diana (see link).
The museum's location within Sydney, despite being near the city centre, is such that it's really difficult to attract foot traffic from wandering tourists, so almost all visitors are people that actually set out with the intention of visiting the museum. This unfortunately means that these "big name" temporary exhibits are really needed to bring in visitors, even if their subject matter strays from the theme of the museum.
For such temporary exhibitions, the museum charges A$20 (for Diana) or A$24 (for Star Wars) on top of the A$10 admission price, but it's really a way for the museum to raise its profile and bring in more people, rather than actually make money. Apparently for the Diana exhibition, the ticket revenue wasn't even enough to cover the full cost of hosting the exhibit.
Your code should be more efficient!