actually i walked into the best buy phone departmentl, and there was a huge stack of coupons right there by the register. just ask them for it and they will give it to you.
I got one for christmas and so far no problems at all and I used it a few times for Golf GPS. The fit is not perfect but it does what it is suppose to do, charge the Iphone. No drop in signal. Worked well with my 3GS and my g/f 3G