eBay Bids for the Rest of S.Korean Arm  SEOUL (Reuters) - eBay Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=EBAY.O target=/stocks/quickinfo/fullquote"&gt;EBAY.O&lt;/A&gt; offered about \$530  million to buy the remainder of South Korean affiliate Internet  Auction Co. Ltd. as it pushes deeper into Asia, saying key  shareholders had accepted a 79 percent increase to an earlier  offer.