By Dan Weil Among the negative reports are soaring mortgage rates and roaring home prices. Home sales are sliding. Amid all the bad news in the real estate market, there is a silver lining, according to Realtor.com. But first, here’s a taste from the bucket of bad news. The 30-year fixed-rate mortgage averaged 5.27% in the week ended May 5, a 12-year high, according to Freddie Mac. The rate increased from 5.1% a week earlier and 2.96% a year earlier. “Mortgages now compared to just a few months ago are costing more money for home buyers,” Lawrence Yun, chief economist of the National Associati…