I have not seen one cheaper. In fact, i think i paid 169. for mine a year or so ago. I almost didn't buy it because i thought it was too pricey. But since it just plugs in and will do a lot of things, i can just unplug it and put it in any vehicle.
I'm not sure if JC Whitney does free shipping, but its $160 at amazon.com, free shipping for orders greater than $25. If you're buying something from there, you could consolidate your packages and get free shipping for small stuff too.