I was expecting a lot of questions about the car, and frankly I enjoy talking about it, so I usually am quite patient with people. But, I too have been surprised by how many people ask how much my Cobra costs, and I find it annoying.
I've used the "range" answer a few times. I also like the "per pound" response, but I think I'll make it a little more challenging by quoting per kilo.
(...now where's that conversion chart?...)