Buy a used one.
If I wanted to find a cheap used Chrysler, I would either use Auto Trader to locate an individual with one, and then check it out, or Craigslist either would work.
A used iPhone can be purchased from EBay and the price is probably right. There are problems associated with used iPhones. The following provides information: ipod.about.com/od/beforeyoubuy/a/buying-used-iphones.htm
The best option is to look for used iPhone 4 accessories on websites like Amazon or EBay. These are also very good sources for new accessories, as well, because they are trustworthy.
Unfortunatly if you didn't sign up for MobileMe when you bought your iPhone, you are out of luck.
You can find a cheap used backhoe online at ebay or amazon
You can buy an iPhone 3 case for cheap on eBay or amazon. They offer multiple cases that were used but are in great condition. Check out those sites today for good deals.
There is not really a way to score the Iphone for cheap as the demand is still very hot so they will sell regardless. You can try and get one on Craigslist or Ebay for a reduced rate as they will be used.
I would reccomend either a used car dealership or if you are looking online edmunds.com is a good website to find the best used hybrid cars available for cheap.
MobileMe
it can be cheap on ebay from 0 to 140 pounds bran new!!! not used
Anywhere where there is either EDGE or Wi-Fi.