Betcha your grand dad will part with his if you promise to keep his yard up once in awhile. An axe with sentimental value tends to receive better care and consequently works better! Failing that start attending garage sales, antique stores and flea markets; at least you'll be able to fondle and inspect whatever it is you take a shine to. Most novices are totally unaware of what it is they want (or need) and heaven knows there are lots of choices when it comes to weights, shapes and lengths.
Or you could go out and buy a chainstore cheapie so as to get some experience and familiarity with axes and then jettison it once you become more discerning.