Toronto residents Stephen and Melissa Heidebrecht have done the math and they’re moving on – to Kitchener.After two years of scouring Realtor.ca, squeezing through open-house crowds and watching homes they’d love to live in go for $100,000 or more over the asking price, they’ve thrown in the towel on Toronto.Last month the Heidebrechts put their 1,500-square-foot, two-bedroom bungalow in east-end Little India up for sale for $599,900. A four-person bidding war later, it sold…