The seller's explanation was that he bought the car from a lady (owner of fifteen years) who had only recently moved to Austin from Florida. Last time she had it registered in Fulton county was 2014, so it sat from then until January, when he bought it off her. He claimed that it ran when he bought it and that she drove it occasionally around the block.
The Lady was selling it Dec '16 for $5600 via Auto Trader. It was stated she owned it 12 years then. From what I can see from the few pics, the current Seller appears to have done little (if anything) to the car except jack the price up (he wanted $10k last month).