Los Angeles-based online postage provider Stamps.com is going private, in a private equity acquisition by Thoma Bravo, the two said on Friday. According to the two, Thoma Bravo will pay $330 per share in cash for Stamps.com, which currently trades on the Nasdaq as STMP. The offer is a 67 percent premium over Stamps.com's price on close Thursday. Stamps.com allows small businesses and other print out postage directly on a printer. Stamps.com was one of the original companies to come out of Southern Caliornia's Internet boom era in the late 1990's, and had its IPO in 1999.