The StubHub logo is seen at its headquarters in San Francisco.Online ticket platform StubHub is pricing its IPO at $23.50, CNBC's Leslie Picker confirmed on Tuesday.The pricing comes at the midpoint of the expected range that the company gave last week. At $23.50, the pricing gives StubHub a valuation of $8.6 billion. StubHub will trade on the New York Stock Exchange under the symbol "STUB." The San Francisco-based company was co-founded by Eric Baker in 2000, and was acquired by eBay for $310 million seven ...