Damn...Its a case of buyer beware. It doesn't help though that the Auction yards are super sneaky. They are pretty dodgy, i.e. Amp up the price, move the car around on forklifts and dent the crap of it.
If the car was not started after the water lodgement, it will be ok.
It will take years for the wires to become corded, most probably last the life of the car.
Most of what Maverick said above is spot on.
Tell her to search for part numbers on google to save ALOT of money. e.g. 1k1XXXXXX into google, will spit out ebay and other sites which have them forsale.