Block in Midtown sold More than two years after Metro's light rail line took its maiden voyage, development along the 7.5-mile route has been slow to materialize, some have said. Others have argued that point, explaining that big changes take time. A lot of the transformation so far has taken place in Midtown, where a prime block of land just sold at the corner of Main and Elgin. A CVS Pharmacy will be built on the southeast corner, according to Marshall Davidson of Cushman & Wakefield, who was involved in the land sale. This will be CVS's second store in Midtown. The pharmacy chain already operates an outlet on Gray in the neighborhood's northern end. Davidson wouldn't disclose the sales price, but properties in the area are being marketed for upwards of $50 per square foot. "Inevitably, there's going to be a premium paid for properties on that rail line," he said. Monte L. Tinkham Properties was also involved in the transaction. nancy.sarnoff@chron.com