Anyone who isn't aware of the up up up price trend in Maine residential real estate over the past year is living in a (probabably very expensive) cave. And, in Portland, that's a trend on steroids. The median price of a single-family home in Portland jumped from $460,000 in February to $514,500 in March, according to the monthly stats put out by Benchmark Real Estate. Those listing a home can expect it to spend a zippy six days on the market. Multifamily Portland prices had a similar hike from February, with the median price of $667,500 is up from $612,500. Multifamilies spend about eigh...