The problem is that you are trying to sell tools that have a very limited market of people that would buy and use them. Those tools are specialty tools, and many are even job specific. Most people that rebuild transmissions, probably already the tools they need. Most new techs, usually are going to buy them off a tool truck on credit or time payments. Plus factor in that many people are moving towards reman transmissions instead of rebuilding.Problem I've ran into is most people won't pay what they are worth.
And unfortunately, even though specialty tools are sometimes expensive, they aren't worth as much used as you would think they are.