"We've got more browsers than buyers these days," said Caruso, 70, a former co-owner of the popular Jerry's Used Books at Colfax and Lincoln. He said he pays about $1,500 per month right now and http://fredericnagu.edublogs.org would have to pay about double that to keep the space. Rising rent The closure of his 35-year-old store comes amid a Denver population boom and record-breaking increases in metro-area apartment and home prices . Recently, several new businesses have opened on the downtown-adjacent stretch of East Colfax Avenue, such as Lost Highway Brewing and the upscale Sassafras eatery which sits next door to Hollywood Posters' 326 E. Colfax Ave. location. "We're seeing a re-gentrifying of East Colfax," said Carolyn Martinez, associate director of Newmark Grubb Knight Frank, a commercial real estate firm.