What do Magna, Utah, Mauldin, South Carolina, and Cottage Grove, Wisconsin have in common? All three of these unassuming communities are listed on Realtor.com’s first annual “Top 10 Best Markets for First-Time Homebuyers Report.” Magna, a Salt Lake City suburb with a population of 26,500 (2010 Census) actually snagged the number one spot on the list, based on criteria including affordable homes, plentiful jobs and young people, shorter commutes and lots of choices for food and drink venues. Magna lies about 20 miles west of Salt Lake City. Completing the top five list, in order of ranking are: Chalco, Nebraska; Mauldin, South Carolina; Beech Grove, Indiana; and Portsmouth, Virginia. In preparing the report, Realtor.com ranked 1,112 cities and locations with a population of more than 5,000, taking into account the share of 25- to 34-year-olds in the local population. They also measured the availability of homes for sale, local job …