BEAVERCREEK, OHIO — Colliers International has brokered the sale of a four-building office portfolio in Beaver Creek, an eastern suburb of Dayton, for $17.7 million. The properties include: 3610 Pentagon Blvd., 3685 Hibiscus Way, 3725 Pentagon Blvd. and 2601 Commons Blvd. The buildings, totaling 143,802 square feet, are currently 85 percent occupied. Jeff Johnston, Steve Timmel and Chris Prosser of Colliers represented the seller, Mills-Morgan Development Ltd. Ger Reb Realty LLC purchased the portfolio.