The 1999 Subaru Legacy is available as a 4-door, 5-seat wagon. Starting at $23,395, the 1999 Subaru Legacy 30th Ann. SUS (A4) Sedan is powered by a 2.5L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 26-mpg on the highway. The top of the line 1999 Subaru Legacy Outback SSV (A4) Wagon, priced at $19,995, is powered by a 2.5L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 26-mpg on the highway.