Ok so I've been looking to get a horse of my own again. The horse that I used to own, I bought as an unexperienced buyer that just wanted a horse. I was told she was 7 years old and when I finally had a vet look at her to do her coggins, he said she was more like 11. So, I'm in the market for a horse for myself and I've been looking at horses about 8 years old or so...but I want an 'easy' horse...one that's well trained, 'bombproof' so that I can go riding by myself and be safe. I'm starting to think I'm looking at the wrong age range and I need to be looking at older. I had someone email me that has a 15 year old quarter horse mare and also I could probably get this TB gelding for free because he's very underweight and his owner can't afford to keep up his food bill. He is 18. So I'm just wondering what is really considered an OLD horse, and how much riding years could I expect to get out of an 18 year old horse?