The guy who bought my Wagon is a chassis/turbo fabricator and has been into the 25.X fab chassis game for a few years. Typically people bring cars to him and he builds to their specs. Lately though he is trying to get into buying clean stock rollers, install 25.X chassis, then market. Basically remove the customer interaction since there is a lot of customer input on a turbo fab build but a chassis is restricted enough by safety specs that there isn't much flexibility. Then the buyer installs the wheels, powertrain, and paints how they want.
I asked how you can make money on that since it seems like there are always affordable rollers that are pennies on the dollar. His response is that most are either A) 8.50 or slower or B) junk. He basically said any cheap 25.X chassis roller isn't something you want to go 25.X speed in. It's often certified but sketchy, or not cert'ed and why it's for sale.
So although I agree that buying a 25.X roller is a good backup plan, from my understanding the likelihood you will find a reduced price 25.X roller that doesn't need extensive rework is slim.