ECHO PARK — For about a dozen years, the mural featuring an earth mother figure with outstretched hands has loomed over the busy intersection of Echo Park Avenue and Sunset Boulevard. Behind that mural by Ricardo Mendoza is a two-story medical office building with about 12,000 square-feet of space. Now, that building along with a small parking lot is up for sale at an asking price of $3.25 million, according to LoopNet. Would it make sense for a new owner to keep the property as a medical office building or go after a new restaurant or other types of tenants on gentrifying Sunset?