I have used the original Foul Out for more than 30 years, still using it. In the 80's while stationed in Germany I used it a lot. The Germans hunt year round and have great sporting guns, but a lot of the older hunters were not big on cleaning their rifle bores. Eventually they fouled and their groups went from one inch to six inches. I cleaned many of their guns returning them to one MOA. I mainly did it to get hunting invitiations. I used the Outers Foul system. Hooked them up and let them work. It was amazing the amount of copper fouling that would come out of those barrels.
If you have a lot of guns that you shoot, or even a few that foul a lot, the $140.00 is worth the price. Don't remember what I paid for mine, but I know I've saved way over $140.00 over the years in bore cleaners and patches, not to mention time.