That is true, you never know what kind of horse you will get at an auction but it is better to get one there than have one bred because at an auction, you very well could be saving that horse from being bought by a kill buyer. Also, yes mustangs can jump. All horses can. But remember that they will not be able to jump as high as most other hunter jumpers because the mustang only averages 14.2 to 15hh tall. However; what they lack in stature, they more than make up for in heart.
Yes mustangs can jump. They can't jump quite as high but that is because they are a little shorter. I don't know for shore about entering show. I believe that with BLM you have a seven year contract in which you aren't allowed to enter in any public shows. I don't know that for shore though.
Of course they can jump. Any horse can jump with training You can even find videos and photos of 1,800lbs drafts on this forum who can jump. You would be saving a horse if you bought him. I would do it
Yes if you were to go to a sluaghter acution definitely YES you would be saving its life but when you buy them at just normal regular acutions you really never know what your geting untill its to late and yes all horses jump including Mustangs