Sales of high-end homes have been slowing in recent months due to a decrease in out-of-country investors, but the rest of the housing market continues to be robust and interest rates are the lowest they’ve been in 2o years at 3.5%, Arcadia Chamber Vice President Andrew Cooper reported at the regular monthly Chamber board of directors meeting on May 28. Cooper, who is also CEO of the Arcadia Association of Realtors, shared the following March report of activity in San Gabriel Valley for board members…