I like to share some more of my feelings towards this.
I do not understand why the general stance here is against the buyer? Even though you can argue that morally he is in the wrong I personally could quite happily live with that knowing that I just made 2000 dollars with one click (let the neg reps begin).
Don't get me wrong not that I feel a little sympathetic with the op, but that sympathy isn't really high to be honest. As I stated in my other post, how on earth can you not pay more attention if you sell something so valuable? We are talking about a sale here that exceeds the monthly income of the average working German... Let me repeat that ... 160 working hours pissed away with one click..
Yes, I agree with Stryker that it would be easier if MA implemented commas, but so many things would have a lot more priority in my book for MA (bring back taming for a start) then to nanny a few people not paying attention.
I think everyone should take a good look at what our world (and EU is a mere reflection of that) actually is. Its not a chocolate factory and mistakes like that are extremely dumb and in 99% of the cases are punished with a loss, and quite rightly in my book. One could argue that if those things aren't punished, the world would not evolve (playing devils advocate on a philosophical level).
Feel free to nihilate me for my opinion, but if you take a good look at yourself (and now be honest, you would have kept the deeds, smiled and thought ... easiest 2000 dollars I made in my entire life) and carried on. If you still seriously say nope, I would have given it back then I'd say you belong to an extremely small group of idealists. An idealists are not a driving force in this world.
Angel