Suddenly, Google (NASDAQ:GOOGL) is getting grabby. According to a report from the Google Operating System, a new service called Google Mine is in the works that would allow Google+ users to document and share what they own.

All Google will say is that it is always working on new things. No news there. But imagine if Google Mine does come to be. Not only could you share notes about your collections, or document valuables for insurance purposes, but you could also Imagine a barter system whereby you sell or trade via Google+, with any money exchanged via Google Wallet. A tailored credit or debit card might not be far behind, says Fool contributor Tim Beyers in the following video.

At the very least, the idea threatens eBay (NASDAQ:EBAY). The company depends on an ever-increasing volume of transactions to fund growth. In Q1, the auctioneer was responsible for $49 billion worth of commerce. By 2015, eBay wants to enable $300 billion in commerce annually, up from $175 billion last year. Google Mine, like Craigslist before it, could stand in the way of that.

Do you agree? Please watch the video to get Tim's full take, and then let us know if having Google Mine would make you more or less bullish on the search king's long-term prospects.

Fool contributor Tim Beyers is a member of the Motley Fool Rule Breakers stock-picking team and the Motley Fool Supernova Odyssey I mission. He owned shares of Google at the time of publication. Check out Tim's Web home and portfolio holdings, or connect with him on Google+Tumblr, or Twitter, where he goes by @milehighfool. You can also get his insights delivered directly to your RSS reader.

The Motley Fool recommends and owns shares of eBay and Google. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.