is it bad if a car cant get an alignment done and has a small leak in the tranny

Hello, What is the alleged cause of the failure to align? If it has wheels, and the suspension and frame are straight, it will align. The bent suspension (or frame) that causes misalignment may have been caused by the same incident, and if the transmission is leaking due to damage, it will likely need replacement. Before giving your money away, have a pre-purchase inspection done by an ASE certified technician of your choice. If the seller refuses a pre-purchase inspection, I, personally, would not buy it.