I wouldn't believe most of what's said in that ad. That's a USDM motor since, as stated earlier, JDM models had either a single turbo (VVTi) or twin turbo 2.5L 1JZ. So the fact that it was imported (by saying it came from a JDM Soarer) is already false. Second, they have a 20K mile gap between the estimated mileage. They more than likely have NO idea how many miles the motor has on it, or they know it's over 100k but figure it'll probably be ok and no one will ever notice. And lastly, i doubt they actually did a compression test. If they did, i'd ask for pictures with the actual gauge in the motor pictured to show the numbers.
Any way you put it, it looks fishy. And if it's too good to be true, it always is.