New York – The world’s first online swap-shop for luxury items is now open for business. BillionaireXchange offers mansions, cars, yachts and fine art, among other premium items, for auction and exchange. Upon signing up, members have to declare their net worth, from less than $500k to above $5m. With its international network of affluent consumers, BillionaireXchange recreates eBay for those in high wealth brackets.