I'm with Grimes and DiggerRoo, You shouldn't pass on one to let it go to a "Collector" if it's what you have a desire for. Isn't it the same desire and passion for these cars that drive a collector to gather them up and use as a restorer or for parts to fix one they allready have. After all if you love to use it for a daily driver then that vehicle will be getting fixed when needed and not sitting around to rust.
My 80 Brat gets 26 mpg city. NAPA and AutoZone seem to be able to get the parts I need fairly easy, some instock and others just 3 days shipped.
My dads 03 BAJA only gets 20mpg