A federal grand jury has subpoenaed records of a 1988 land sale in which a Virginia state legislator and a former Prince William County supervisor made a $485,000 profit on a site used as right of way for the Fairfax County Parkway, sources said yesterday.

State Del. David G. Brickley (D-Prince William) and G. Richard Pfitzner sold a 3.8-acre parcel to the Commonwealth of Virginia for $800,000 in November 1988, according to records filed in Fairfax Circuit Court. They had purchased the land 15 months earlier, in August 1987, for $315,000, the records show.

Assessment and other records for the property are among those subpoenaed by a federal grand jury in Alexandria that is investigating state land purchases for the parkway, formerly known as the Springfield Bypass, according to sources.

Brickley and Pfitzner, who was a Prince William board member from 1979 to 1987, bought the property from the Springfield post of the Veterans of Foreign Wars. Five people associated with the post said yesterday that the FBI recently expressed an interest in the sale. Two members of the post said they had been interviewed by an agent about the transaction.

"God no, we wouldn't have sold it if we had known we could have made another half-million" by waiting to sell it to the state, said former post commander Jack Payne, who said he has had "conversations" with the FBI about the sale. "My understanding is they {the FBI} want to know why the state paid so much for that piece of land," he added.

Officials for the FBI and the U.S. Attorney's Office for the Eastern District of Virginia would not comment on the subpoenas or the investigation.

The property is at 7026 Hooes Rd., south of Springfield and just west of Interstate 95 and Backlick Road, and it will be bisected by the northern spur of the parkway. When completed, the 35-mile cross-county expressway -- considered the county's number one transportation priority -- will connect Route 7 in the northwest part of the county with Route 1 in the southeast.

Brickley, 46, who was first elected to the House of Delegates in November 1975, said yesterday that there was nothing inappropriate about his purchase of the land or its sale to the state. When his partnership bought the property, Brickley said, he did not know that it was in the future path of the parkway.

"Any implication that I knew where the alignment {of the parkway} was is really unjustified," Brickley said. He said he has not been contacted by any federal officials about the grand jury investigation.

Brickley said his partnership bought the property to combine it with a parcel across the street that it had purchased in 1978, hoping to eventually get all the land rezoned so it could erect an office building or hotel there.

"I invested in Fairfax because . . . I don't represent Fairfax" in the legislature, Brickley said. The sale of the land to the state for the parkway, he said, "was something I did not want and didn't expect."

Pfitzner, who is also a former chairman of the Prince William County Democratic Party, could not be reached for comment.

Brickley and Pfitzner received negative publicity in 1982 when their partnership was involved in land deals near the future Prince William County administration complex. At the time, Pfitzner was a member of the Board of Supervisors.

After questions were raised, Brickley said, he asked for an investigation by the state police, which found no wrongdoing.

The current investigation came to light after the federal grand jury issued three subpoenas to Fairfax County seeking information about land in or near the path of the parkway. Sources familiar with the subpoenas said that one delivered to the county Office of Transportation specifically asked for information about the property formerly owned by Brickley and Pfitzner, in addition to four other parcels they did not own.

Another subpoena asked for assessment information from 1980 to 1989 for all lots along Hooes Road between Accotink Creek and I-95 that were acquired by the state or county for the parkway, sources said. That includes the parcel Brickley and Pfitzner once owned.

In January 1988, Fairfax County assessed the land and a small house on the property at $62,800, according to tax records.

Brickley said the assessment was so low partly because the county had stopped permitting any development in the area, citing uncertainty about which parcels would be needed for parkway right of way. If development continued on parcels that eventually were needed, it would have unnecessarily escalated the cost of building the road.

The VFW's Payne said officials for the group decided to sell the land because they had been told by the county that they would not be allowed to develop it because of parkway constuction. "Everybody knew it {the parkway} was going through there. There were a lot of public hearings on it," he said.

According to a county official, who asked not to be identified, the path of the parkway in 1987 was known "down to inches." The Board of Supervisors endorsed the final design, including all intersections and stoplights, in June 1987 and the final design was approved by the Commonwealth Transportation Board in July 1987, a month before the deed of trust was turned over from the VFW to Brickley and Pfitzner, according to land records.

Brickley said, however, that at the time his partnership was negotiating the purchase and putting a contract on the property, it was known only generally where the parkway would go, not which specific parcels it would cross. He said he did not know exactly when he learned the land would be needed for the parkway.

Staff researcher Bridget R. Roeber and staff writers John F. Harris, Thomas Heath, Brooke A. Masters and Claudia Sandlin contributed to this report.