Halkey-Roberts Corp. purchased 11 acres at 28th Street North and 102 Avenue North in St. Petersburg for $3.75 million, or approximately $340,909 per acre. The 11-acre parcel is in the Gateway submarket just west of I-275. Halkey-Roberts purchased the property from Tarpon Ridge Inc. in order to construct a 150,000-square-foot manufacturing facility. The ground break date has not been disclosed. John Dunphy of Colliers Arnold represented the buyer.