Hello Ironbender,
While it's been MANY years ago, I use to go to the BLM Mustang horse sales in Rock Springs, WY. and Delta, UT
https://www.blm.gov/adoptahorse/index.phpBack in the day it cost $25 Today I think that it's $125
I think that I bought about 20 of them as a high school kid. Broke em, sold em, and did it again.