Lisa Carpenter of Mansard Commercial Properties sold a 5,000 square-foot property at 267-271 Lexington St. in Waltham for $430,000.

The former owner of the retail and industrial property was Robert Najarian, who sold to a private buyer represented by James Brooks from New England Realty, Carpenter said.

"The swift sale of this property to a cash buyer was an indication of the need for this type of real estate. There is great satisfaction in bringing together motivated buyers and sellers in this troubled real estate climate," she said.