Re: FJ with Salvage Title, how much less than clear title FJ?
You need to look at "Frame Damage" category and at "Airbag Deployment" category - that will tell you if the FJ was seriously crunched. A rollover will also total out an FJ without frame or airbag damage, but usually they note that in the Carfax.
Most states they declare a car total loss if repair costs greater than 80% of book value.
If it's a total loss, and nothing in the Carfax report about the damage, then you have to suspect water. If it is from the Gulf Coast area, right on the coast, and gets declared total loss and no more details, look and see if the date matches a hurricane hitting the same area within 60 days.
I would not be worried about the salvage title once you know what the damage was - often insurance companies make more parting out the wreck or selling it off and totaling the vehicle - particularly with FJ's due to high resale value and limited pool of vehicles. If the airbags deployed and you had frame damage, it might still be a good buy - but you would need to get it up on a frame straightener and look at it to be sure it got fixed right.
The box frame of the FJ can be straightened, just like old cars from the 1970's could be. I straightened a Shelby Cobra back in 1978, bent so bad one rear wheel sat just off the ground - don't let anyone ever tell you a 428 inch motor is weak...LOL - the frame bent when the posi-track rearend hooked up hard after tires got good and hot.
If you don't see any airbag deployments, and the car is from somewhere far from New Orleans or Houston - you are probably OK. But outside of Carfax, you are on your own as far as I know...