I tried to fix the headphones entry for the iPad 1st gen (I still have mine) but the site won't let me. These older iPads have headphone jacks (young folks may not know what these are) and definitely not Lightning connectors (rather, 30-pin). I was able to alter the original OS, which was 3.2, not 4.3. Mine has 3G+64GB and cost well over $1000.
A very complete comparison of ALL iPad models from the very beginning, with all kinds of info about each one, including base price.