Taiwanese PC vendor Acer Inc. has started selling laptop PCs at popular retailer Best Buy Co. Inc., expanding its presence in the U.S. market. Best Buy is featuring Acer laptop PCs with a brand spotlight notice on its Web site. All five of the Acer laptop PCs on offer at Best Buy are priced under US$900. The most expensive of the five is the Acer Aspire AS5610-4537, which runs on an Intel Corp. Core Duo processor. It costs $849.99.