150's are expensive. They have electrical systems and that means radios, transponders, batteries, alternators, ect..... Cheifs, Taylorcrafts, luscombes, ect. With no electric systems are way cheap. A continental A-65 only burns 4 gallons working hard. Pull it back and you are down to 3 or less GPH. this can also be done with car gas. A real soild example of the above airplanes can be found for 13,000. Fly your hours and sell it for 13,000. If you can find a nice Taylor J2 Cub they have Continental A-40 engines even cheaper! If you want to get rediculouse the Aeronca C2 is by far the cheapest.