SEOUL, March 16 (Reuters) - South Korea’s SK Telecom and private equity firm MBK Partners were among those that entered non-binding, preliminary bids for the sale of eBay Inc’s South Korean business, the telecom company and two sources with knowledge of the matter said on Tuesday. EBay Korea operates open market e-commerce platforms Gmarket, Auction and G9, and was South Korea’s third-largest e-commernce firm in 2020 with 12.8% market share, according to Euromonitor. MBK Partners and eBay Korea declined comment. (Reporting by Joyce Lee, editing by Louise Heavens)