It wasn't immediately clear whether the deal is a record, but it's higher than the latest big downtown land deal, the $43 million purchase of a 2-acre lot in Miami Worldcenter by New York-based  Lalezarian Properties LLC. That deal breaks down to $21.5 million per acre.

There is one remaining lot available at the development underway on 27 acres spanning 10 city blocks.

The master development team if offering a 2.18-acre parcel on Northeast First Avenue between 10th and 11th Streets. It could be developed with 1.7 million square feet of space, including 1,100 residential units.

Miami Worldcenter Associates is led by Art Falcone and Nitin Motwani, both big names in South Florida real estate, and includes Newport Beach, California-based Centurion Partners LLC and Los Angeles-based CIM Group. They are partnering with other developers building portions of the project.

Parts of the $4 billion endeavor were completed last year, including two residential towers and the buildout for half of the retail space.

The 60-story Paramount Miami luxury condominium tower and 43-story, 444-unit Caoba apartment tower were finished last year. Half of the planned 300,000 square feet of retail space is ready for tenant buildout.

The 43-story, 434-unit Luma apartment tower and the 12-story, 351-key citizenM hotel are under construction.

On their heels is a high-end Legacy Hotel & Residences hotel condominium with a 255-key hotel below 278 branded condo units. Developer Royal Palm Cos., which also built Paramount, started sales.

Other plans call for a 600,000-square-foot office tower and a 1,700-room Marriott Marquis Miami Worldcenter Hotel & Expo Center with 500,000 square feet of convention space.

Miami Worldcenter is east of the Virgin MiamiCentral train station and west of downtown attractions including the Perez Art Museum Miami, Frost Museum of Science and AmericanAirlines Arena.