Some people just throw money away.. when you have people like me that cant afford decent groceries.. might as well take a stack of hundreds and torch them.
If you can't afford decent groceries, why are you wasting a ton of money every month paying for 2 iPhones? You have paid thousands over the life of owning that phone.
But I digress. There are no "good" cases (despite there being several that actually do exist) because that phone is 2 years old, which is a lifetime in cell phone years. Not to mention there's about 20x more iPhone 3G/3GS models out there than there were v1s, so would you make a case for an audience of thousands or an audience of millions, if you were a manufacturer? Yeah, I thought so.