Get a fitting done first
Before you buy any saddle, hire a fitter to find out what you need. Most have quite a few saddles to try and many have adjustable saddles, which they can adjust until it feels just right. Then when you are looking you will know seat size, flap length and position, gullet width, all very important if you are going to expect your horse to move comfortably. Do not buy a saddle that doesn't fit, no matter how cheap it is. You may not be able to afford the saddles they sell, but it will give you something to shoot for. I met the County fitter at a barn and paid the $125.00. It was the best money I ever spent. Also I know someday I am going to own a "Perfection" saddle, I never felt anything like that before.