Ours is $200,000. I did a calculator a few years a go and at that time it was $180,000. We have since moved house (sept '10) and bought more pieces of furniture, tv etc and increased it then by another $20,000.
To get to this figure I had to count all the DVDs/CDs, Pants, t-shirts, forks etc and say what quality they were, there was 3 levels. I thought about the product ie our 3 wheeler pram and if the standard figure didn't cover it I raised it to the next level.