I have one: it is a great cart and substantially below $US5k, mine has a wood body but aluminium cantilever as the ruby was a bit much for me. It pushes all the right buttons for me: clean bass, detail without being sterile. It just sounds quite neutral to me and very musical. You can contact Andre via his web site and get a price. I don't want to give the price I paid as he said the prices were going to rise because of the global financial crisis and the fluctuations of the South African Rand, however, $US5k is not even close.
The problem with carts is that you often have to buy on reputation and trust, I have never regretted buying a Mantis, the most expensive, but far and away the best cart I've ever owned.
DS