It's hard to give you advice without some more information. Are you looking for a Hill style longbow (American flat longbow), a mild reflex/deflex bow, or a hybrid? Does length matter? What is your draw length?
As has been said, there are often great deals in the classifieds.
If you want new, custom made, Jason Kendall builds a great hybrid longbow at a reasonable price, his Kanati. Hill style bows are not outrageously expensive if you stick with standard riser woods, colored glass, and standard core wood (varies with the bowyer). Northern Mist, Howard Hill Archery, and several others are available and are quality bows.
I tend to lean toward the classified ads myself. You can buy and try used bows, then trade or resell them for close to what you paid if they don't work out for you. I've tried a bunch!
My Kanati will never leave me. Other bows are subject to change.