I'd walk from that deal unless you thoroughly check the things Dave pointed out in the other thread. For $500 you've got a hell of a down payment on a built trans from Dave or Lonnie etc built from a different core and made to work. There's other codes for performance trans cores that work good and in some cases preferred over the br. Or get ahold of bison and see if he still has br valve bodies from cars converted to kc valve bodies etc. either way I'd never be desperate enough to pay $500 for a "possible" brf core. remember you're mostly chasing part throttle manners and not WOT performance longevity with other cores when built properly.