Pre Purchase Exam. The mare I have now I got at an auction with no PPE, and she is awesome......my wonderful old arab gelding that I had for years I bought for $500 with no PPE. The one mare I did have a PPE on, as well as a 2 week trial period, turned out to be one of the most difficult and awful horses I have ever delt with. I sold her after 6 months and never looked back. IME, with horses, it is *always* a crap shoot. Just keep your fingers crossed that you get along with them, and if you don't, after a reasonable amount of trying, find 'em another home. Life is too short, amd riding is supposed to be fun