If you'd buy twice as many at $65 than at $155, then you've just proven why, to maximize profit, they should be selling it at $155 instead of $65. 155n vs 130n is pretty straightforward, and the point of luxury brands is that not everyone is wearing them.
Not to mention that it has been proven in many studies that what people say they would pay for something is never an accurate representation of what they would actually pay. The actual amount is almost always found to be lower.
Also if you can only produce n where n < d (d, is the demand) you might just as well raise the price of those n pieces produced until n = d.
You can use the profit to create an umbrella brand and increase production. The extra items from the increased production (from the extra profit) can be sold at a different price under a different brand so to let people who can afford to pay more, pay more, and get to feel special.
Note: I think the OP was just trying to say if it costed less, he would shop more. He might not have meant he'll buy exactly double.
