@tilsim and @shazo, plus for everyone else as well..and sorry @intoxicated, not trying to kill your sale/s, just putting across an honest assessment from my side, which may also aid someone in their decision.
Guys, just a headsup - while these upgraded ECUs provide great features, ones usually not on stock ECUs, the optimizations built in are usually done as per the previous owners' car and its installed parts (aftermarket parts, etc).
It is entirely possible that the ECU will work in its entire options on one vehicle, and not even idle properly on another vehicle! One small example of this would be if one of the older 1UZs which had a cold start injector (CSI) and this ECU was taken off from an engine without the CSI, or re-programmed by Mine's without that feature.