How much would you pay for a jar of Big Mac sauce? Keep in mind that there are only 200 bottles available and they are being sold on eBay in Australia. The proceeds are going to support Ronald McDonald House Charities. So, what would you pay? Right now... you'll need to outbid the current high bid for $23,000 Australian. Who would have thought that a Thousand Islandish dressing would sell for more than gold.