HIGHLAND PARK, N.J. — Gebroe-Hammer Associates has brokered the $30 million sale of Donaldson Park Apartments, a 152-unit apartment community in Highland Park. Joseph Brecher of Gebroe-Hammer represented the seller, JGT Managing Partners, in the transaction. JGT was the original developer of the garden-style community, which was built in 1966. The buyer was Oxford Realty Group. Located at 321 Crowells Road, the six-building property features eat-in kitchens, hardwood floors and sliding-glass-door patios. The community is located near the 90-acre riverfront Middlesex County Park, which includes a boat ramp, sports fields and paved trails.