Bizzarrini/Lamborghini P538

The Bizzarrini/Lamborghini p538 is to be auctioned at the Kruse Auction (http://www.kruseinternational.com/vehicles/detail.asp?auc_code=monterey04&consign=441&YEAR_BEGIN=&YEAR_END=&MAKE=Bizzarrini&MODEL=&SEARCH_NAME=Bizzarrini&PAGE=1)

I've read about these cars but have never seen one. It looks absolutely beautiful. Any one know what this might be worth and maybe where the others made are at?