The first question is exactly what model is it? Some of the older Futaba AM units are in fact obsolete wide band radios and no longer legal to use. If it is an older unit, Perhaps a Conquest AM the first thing I would check is if there is a small gold colored (not silver) sticker anywhere on the radio with markings RCMA and a date.

I always recommend to new folks that untill they know exactly what they are buying the places like Ebay are to be avoided at all costs. If this radio does turn out to be a narrow band or narrow banded unit then the other question is battery condition. Both Tx and Rx battery could be very questionable. This could cost more than you paid for the whole set. Really as inexpensive as basic four channel starter sets are now somewhere around 110 to 130, I can only reccomend new sets for folks starting out. Buying used later is fine when you will possess more Radio Street Smarts.

John