Pittsburgh's residential homebuying market is steadily improving, according to West Penn Multi-List, which reported a solid supply of housing inventory in the first quarter and more homebuyers entering the market as better access to credit has made it easier to obtain mortgages. "On average, more people are employed and making more money than they were at this time last year," said Tom Hosack, president of the West Penn Multi-List, and president and CEO of Northwood Realty Services in McCandless.