plz help me chose a vintage car frm years 1965-1990?

hi everybody. ive been working for the past year and a half to save up for a an old fashion vintage car. i have saved upto 5grand and im ready to buy it. but with so little money i dont have a lot of options. also gas prices are a vital factor. i just dont want to spend 7 bucks for every 25 miles that i drive. anybody knows any old fashion car that by any chance is reasonable on gas?