The sad thing is... I'm dead serious.
I watch my local craigslist as well as eBay and the forums just in case there are and "too good to be true" deals that I can scoop up. Frankly, iPhones simply are overpriced. You realize that people STILL value iPhone 2G's at > $100? Imagine the condition of most of those phones by now. iPhone 3G's are still valued at $200+. $200+ for a phone that's 3 generations old and has known performance issues with current iOS software?! Seriously!!! And god forbid said phone is already jailbroken. That easily adds another $50-$100 to the base price!
As a comparison, I can go out and pick up a Captivate or Vibrant without too much trouble for $200 +/- $50 (yes, I've seen them as low as $150). What phone can I compare to an iPhone 3G... how about a Droid A855. I can EASILY find those for $100, in excellent working condition with accessories. How about an HTC EVO - wasn't that last year's "super phone"? $150 no problem. DroidX and HTC Incredible, easy to find for $225 and $175 respectively.
All of these are easily comparable to the iPhone 3gs, let alone could be considered superior to the iPhone 3g, and yet the iPhone 3gs still commands upwards of $300+ on resale "value" for what could arguably be considered a sub-par product by today's standards. Why? There's only one reason, as previously mentioned: The stupid Apple tax.
There are so many things wrong with this its laughable.
Do you truly think apple sets the price for the used cell phone market? Are you kidding me? Do they have ANYTHING whatsoever to do with the market for a used iPhone? Give me a fucking break.
The free market decides the price of a used iPhone. Person A thinks that they can sell their iPhone 3GS for $300, and they end up doing it. These prices listed on craigslist dont come out of nowhere. The iPhone 3GS is still in high demand, and its in obviously very high demand when it comes to the used market. Thats why it commands a higher price than what you think are 'superior' phones. The free market obviously doesn't think these phones are 'superior' or else they would be paying more for them.
You know why all those phones you listed are cheaper than the iPhone? Because the FREE MARKET decided that the iPhone 3GS is more valuable than the HTC Evo, the captivate, the droid, and every other phone that you named. Apple has absolutely nothing to do with it.
The price of the iPhone should not be lower just because *YOU* think it should be. You arent some special decision maker of used iPhone prices. If you dont buy it at that price, someone else will. Thousands of people in the market for a used iPhone have decided it should be sold for that much.
Are you really saying that Apple decides the price of their product on the used market?
Your argument is 'sub-par' at best, and downright retarded at worst.