If it truly is a platinum and not a silver, then the transmission is worth $400 as a core. I hope your intent is to get it running and use it, but I always consider the risk minimal if I can part it out and recover the purchase price.
This assumes you have the space and ability to repair or part it out. If you are paying someone to repair it, you will end up upside down. Even at free.
This assumes you have the space and ability to repair or part it out. If you are paying someone to repair it, you will end up upside down. Even at free.