SEA GRIT, N.J. — Gottesman Real Estate has purchased Old Mill Plaza in Sea Grit from Sitt Asset Management for an undisclosed price. The 52,000-sqaure-foot center, which is located at 2100 Highway 35, features a stand-alone office building and retail space. Tenants include Century 21 Real Estate, Weight Watchers, Wings Gym, Quickie Print and Old Mill Travel. Gottesman is planning to implement a capital improvement plan for the center, which was 77 percent occupied at the time of the sale. Bill Lenaz of R.J. Brunelli & Co. and Greg Nowell and Chris Santoro of Sitar Co. represented the seller in the transaction. CB Richard Ellis will manage the property.