Take the electronic's to be 100% ng, if not now but in time will fail.  If any saltwater you just can't believe what it will do

I have heard horror stories of folks buying flooded cars.  What Grabber Blu said is pretty much exactly the reason you really wouldn't want to get into buying a flooded car.  Personally I think it would be best to steer clear.

One of the problems I've heard of is silt.  Flood waters can deposit mud and silt in every nook and cranny in the body.  And these placed will always hold moisture and be sources for rust.  Just sayin.   The Fox seats in our HT were from a flooded car.  I saved the lumbar bladders, switches, pumps,  and control valves...all of which surprised me.  Completely bead blasted the frames (rust) and replaced all foam and upholstery which wasn't a surprise as I planned to do that anyhow.  But, I didn't know they had been flooded when I laid down my bux (ebay) and I would have passed for less rust had I known.

BB
 

The problem I see is what was done immediately after?  If it was my car, and I got to it in short order I wouldn't worry about it.  I'd pull the plugs, make sure there was no water in the cylinders, change all the fluids, pull every electrical connection apart/blow it out/pack with dielectric grease, and figure the interior is probably at least 80% shot.  But, buying a car a month later that didn't have any of that stuff done?  Hard pass.  Too many unknowns, and its like the saying goes: the cheapest car you ever buy will be the most expensive one you ever own.  You can easily end up chasing gremlins forever.  An older car without all the electronics?  I might roll the dice.  Consider that there are several computers in new cars in the interior to protect them from the elements.  They aren't sealed or potted.  The cost of those alone could be several thousand dollars, and they may require flashing to work right.  Add in the concern about rust and mold, and it just seems like a nightmare. 

After Sandy Toyota had 1000's of cars in port Newark that were flooded, the reps said they watched from afar seeing air bags going off, lights going on and off and all kinds of crazy things happening.
Toyota made the reps supervise the cars being crushed and scrapped, nothing from those cars seen any kind of market.  Even things like tires got scraped.

There is a reason why ins company's salvage these car's that receive flood damage.  Even one's with very minor damage, they don't want the responsibility down the road.   They get there 20% salvage and move on.  They know what their exact losses are.

People just can't comprehend a current year 40k car that looks just great can't even get to the point of starting so they can export it.  When we removed the window switch and opened it up it was just a green gob of mung.  That's what the rest of the wiring and ECU's will look like, some of these new cars can have up to 15 ECU's


 

a few years ago there was a 66 or 67 fairlane on ebay for sale 427 in it and it had been in a flood. seems to me that would be enough work but a newer car, no thanks. not to mention the longer it sits without being cleaned up the worse the problems could be in the long run. I bought a 89 GT mustang fro the Houston area, NOT a flood car, for the trans. turned out to have a great engine too. anyway, remember not a flood car, when I got home to west texas with it, it had frogs living in it.

If you can find a truck that git hit really hard in the back end that can be a good way to go.  A friend of my neighbor's (actually, the guy who used to be half owner in the shop that painted my '67 back in the day) bought a wrecked truck like that.  $2,000 for a new frame direct from GM, bought a take off bed in good condition, bought most other parts it needed used, and with the cost of the truck, etc. had about $15,000 tied up in a truck that new sold for $35,000.  The reason the insurance company totaled the car was because of the labor cost required to put it back together.  Transferring everything over to a new frame is very time consuming.  He did all the labor himself and saved $20,000 over buying a new truck.