Though only the extended foil copies of the card are truly standing out price-wise, going from $3.60 at the end of April to $12.90 today, regular foils have - at least proportionally - had an even bigger spike, going from under a dollar to $5.70 in the last week
For collectors, pokemon cards 1st generation , 1st generation pokemon card packs , all generation 1 pokemon cards , 2nd generation pokemon cards , second generation pokemon cards , generation pokemon cards , and pokemon first generation packs have always been valuable, along with the popularity of first generation legendary pokemon generation 1 legendary pokemon , and legendary pokemon generation 1
Don't rely on it for having all the recent sales data and don't rely on it for having information on every grading provider
(2/1/2014) The effect that causes the creature to gain indestructible doesn't have a duration