The first is a Western Saddle. You can measure the seat by placing a measuring tape at the base of the horn to the edge of the cantle. It looks to be better than junk in quality but nothing too fancy. If you could find a makers mark on it, you would be better off. They are usually on the left side of the saddle. I see it has a number stamped on the back...that usually indicates that it isnt a completly junk saddle. Without a makers mark, you could expect to get around $200 for this saddle.
The second saddle is an english saddle. You can get the seat size by measuring from the nail head on the front of the saddle to the middle of the back of the saddle. This looks to be a lower quality saddle. Look under the flaps on the saddle for a makers mark. While it looks functional, its not a high end saddle. You could probably get between $35-$75 for this saddle.
The last is a vintage western saddle. It needs some repairs which significantly lower the value. I don't see a makers mark but the styling reminds me of a Simco. Without the repairs, this saddle would be worth around $50-$100 depending on if you can find a collector.