Open it up and see if the cart is blue or black....
Ha Ha. I was actually curious as to if there is any way to know which one it is.
Short version:
I think it is legit.
Long version:
I would wager it is an original seal.
Resealed games are usually alot sloppier looking and do not have hangtabs.
Also you can't really make it out in the pictures but i bet the cello has tiny tears in probably every corner and is really taut along the edges which is something else indicative of age.
When i worked at GameCrazy we actually did reseal games and i have bought stuff from game shops that was resealed and in my experience it is always much more apparent. Cello/plastic is different, seams are sloppier, where edged meet reseals usually turn into "horns" from excess/overlapping plastic melting down.
Thanks for the feedback. I think it looks real, and it does have the seal splitting apart a little towards the top of the one side.
To everyone else thanks for the suggestions of going to Nintendo Age. I posted it there and also PM 'd Bronty and he said it's always hard to tell in pics, But from his experience and what he sees. He said he thinks it is authentic.
REALLY Excited about this. Although I have no idea of the value.