Before the Prius:
1999 Hyundai Accent L, purchased new in 1999 for $8000. About 35 miles per gallon. Primary car, I drove it 50-100 miles a day.
1994 Ford Explorer XLT 4WD, purchased used in 2000 for $10,000. About 15 miles per gallon on a good day. Secondary car, my wife's commuter.
After the Prius:
2004 Prius, averaging... well, see my avatar for a current number. Primary car, I drive it 50-100 miles a day.
1999 Accent: Secondary car, my wife's commuter.
1994 Explorer: Camping/hauling truck. Only 2000 miles added since LAST July.