NEW YORK (Reuters) - Shares in web retailer eBay (EBAY.O) could be worth 30 percent more than current prices as a promised turnaround in its core online-auction business begins to yield results, weekly financial paper Barron's reported.

Investors would benefit from a "copious cash flow," stabilizing consumer economy, and fast growth at eBay's PayPal payment service and its Skype online phone unit, the paper said.

EBay "looks like a bargain relative to similar e-commerce outfits such as Amazon.com (AMZN.O), which have considerably higher price/earnings multiples."

(Reporting by Yinka Adegoke; Editing by Leslie Adler)